Who am I between 1200 and 1300 3 in the tens place even number one digit is repeated?
NCERT Solutions for Class 6 Math Chapter 1 Number System are provided here with simple step-by-step explanations. These solutions for Number System are extremely popular among Class 6 students for Math Number System Solutions come handy for quickly completing your homework and preparing for exams. All questions and answers from the NCERT Book of Class 6 Math Chapter 1 are provided here for you for free. You will also love the ad-free experience on Meritnation’s NCERT Solutions. All NCERT Solutions for class Class 6 Math are prepared by experts and are 100% accurate. Show Page No 5:Question 1:Write the numeral for each of the following numbers: Answer:(i) Nine thousand eighteen = 9018 Page No 5:Question 2:Write each of the following numbers in words: Answer:(i) 63,005 = Sixty-three thousand five Page No 5:Question 3:Write each of the following numbers in expanded form: Answer:(i) 15,768 = (1 x 10000) + (5 x 1000) + (7 x 100) + (6 x 10) + (8 x 1) (ii) 3,08,927 = (3 x 100000) + (8 x 1000) + (9 x 100) + (2 x 10) + (7 x 1) (iii) 24,05,609 = (2 x 1000000) + (4 x 100000) + (5 x 1000) + (6 x 100) + (9 x 1) (iv) 5,36,18,493 = (5 x 10000000) + (3 x 1000000) + (6 x 100000) + (1 x 10000) + (8 x 1000) + (4 x 100) + (9 x 10) + (3 x 1) (v) 6,06,06,006 = (6 x 10000000) + (6 x 100000) + (6 x 1000) + (6 x 1) (iv) 9,10,10,510 = (9 x 10000000) + (1 x 1000000) + (1 x 10000) + (5 x 100) + (1 x 10) Page No 6:Question 4:Write the corresponding numeral for each of the
following: Answer:(i) 6 × 10000 + 2 × 1000 + 5 × 100 + 8 × 10 + 4 x 1 = 62,584 (ii) 5 × 100000 + 8 × 10000 + 1 × 1000 + 6 × 100 + 2 × 10 + 3 × 1 = 5,81,623 (iii) 2 × 10000000 + 5 × 100000 + 7 × 1000 + 9 × 100 + 5 × 1 = 2,05,07,905 (iv) 3 × 1000000 + 4 × 100000 + 6 × 1000 + 5 × 100 + 7 × 1 = 34,06,507 Page No 6:Question 5:Find the difference between the place values of the two nines in 79520986. Answer:The place value of 9 at ten lakhs place = 90 lakhs = 9000000 Page No 6:Question 6:Find the difference between the place value and the face value of 7 in 27650934. Answer:The place value of 7 in 27650934 = 70 lakhs = 70,00,000 Page No 6:Question 7:How many 6-digit numbers are there in all? Answer:The largest 6-digit number = 999999 Page No 6:Question 8:How many 7-digit numbers are there in all? Answer:The largest 7-digit number = 9999999 Page No 6:Question 9:How many thousands make a lakh? Answer:One lakh (1,00,000) is equal to one hundred thousand (100 × 1000). Page No 6:Question 10:How many thousands make a crore? Answer:One crore (1,00,00,000) is equal to one
hundred lakh (10,000 × 1,000). Page No 6:Question 11:Find the difference between the number 738 and that obtained on reversing its digits. Answer:The given number is 738. Page No 6:Question 12:What comes just after 9547999? Answer:The number just after 9547999 is 9547999 + 1 = 9548000. Page No 6:Question 13:What comes just before 9900000? Answer:The number just before 9900000 is 9900000 ‒ 1 = 9899999. Page No 6:Question 14:What comes just before 10000000? Answer:The number just before 10000000 is 10000000 ‒ 1 = 9999999. Page No 6:Question 15:Write all 3-digit numbers using 2, 3, 4, taking each digit only once. Answer:The 3-digit numbers formed by 2, 3 and 4 by taking each digit only once are 234, 324, 243, 342, 423 and 432. Page No 6:Question 16:Write the smallest number of different digits formed by using the digits 3, 1, 0, 5 and 7. Answer:The smallest number formed by using each of the given digits (i.e, 3,1,0,5 and 7) only once is 10357. Page No 6:Question 17:Write the largest number of different digits formed by using the digits 2, 4, 0, 3, 6 and 9. Answer:The largest number formed by using each of the given digits only once is 964320. Page No 6:Question 18:Rewrite each of the following numerals with proper commas,
using the international place-value chart. Also, write the number name of each in the international system. Answer:Representation of the numbers on the international place-value chart:
The number names of the given numbers in the international system: (i) 735,821 = Seven hundred thirty-five thousand eight hundred twenty-one Page No 6:Question 19:Write each of the following in figures in the international place-value chart: Answer:
Page No 8:Question 1:Fill in each of the following boxes with the correct symbol > or <: Answer:1003467 > 987965 We know that a 7-digit number is always greater than a 6-digit number. Since 1003467 is a 7-digit number and 987965 is a 6-digit number, 1003467 is greater than 987965. Page No 8:Question 2:Fill in each of the following boxes with the correct symbol > or <: Answer:3572014 < 10235401 We know that a 7-digit number is always less than an 8-digit number. Since 3572014 is a 7-digit number and 10235401 is an 8-digit number, 3572014 is less than 10235401. Page No 8:Question 3:Fill in each of the following boxes with the correct symbol > or <: Answer:Both the numbers have the digit 3 at the ten lakhs places. Page No 8:Question 4:Fill in each of the following boxes with the correct symbol > or <: Answer:Both have the digit 1 at the crores places. Page No 8:Question 5:Fill in each of the following boxes with the correct symbol > or <: Answer:27596381 > 7965412 We know that an 8-digit number is always greater than a 7-digit number. Since 7965412 is a 7-digit number and 27596381 is an 8-digit number, 27596381 is greater than 7965412. Page No 8:Question 6:Fill in each of the following boxes with the correct symbol > or <: Answer:Both the numbers have the same digits, namely 4, 7, 8 and 9, at the crores, ten lakhs, lakhs and ten thousands places, respectively. Page No 8:Question 7:Arrange the following numbers in descending order: Answer:102345680 is a 9-digit number. 63521047 and 63514759 are both 8-digit numbers. 7355014 and 7354206 are both 7-digit numbers. The given numbers in descending order are: Page No 8:Question 8:Arrange the following numbers in descending order: Answer:23794206 and 23756819 are both 8-digit
numbers. 5032790 and 5032786 are both 7-digit numbers. 987876 is a 6-digit number. The given numbers in descending order are: Page No 8:Question 9:Arrange the following numbers in descending order: Answer:16060666 and 16007777 are both 8-digit numbers. 1808090 and 1808088 are both 7-digit numbers. 190909 and 181888 are both 6-digit numbers. Thus, the given numbers in descending order are: Page No 8:Question 10:Arrange
the following numbers in descending order: Answer:1712040, 1704382 and 1702497 are all 7-digit numbers. 201200, 200175 and 199988 are all 6-digit numbers. The other two numbers have the same digits, namely 2 and 0, at the lakhs and ten thousands places, respectively. The given numbers in descending order are: Page No 8:Question 11:Arrange the following numbers in ascending order: Answer:990357 is 6 digit number. 9873426
and 9874012 are both 7-digit numbers. Clearly, 4 < 7 ∴ 9873426 < 9874012 24615019 and 24620010 are both 8-digit numbers. Both the numbers have the same digits, namely 2, 4
and 6, at the crores, ten lakhs and lakhs places, respectively. The given numbers in ascending order are: Page No 8:Question 12:Arrange the following numbers in ascending
order: Answer:5694437 and 5695440 are both 7-digit numbers. 56943201, 56943300 and 56944000 are all 8-digit numbers. The
other two numbers have 3 and 2 at their hundreds places. The given numbers in ascending order are: Page No 8:Question 13:Arrange the following numbers in ascending order: Answer:700087 is 6-digit number. 8014257, 8014306 and 8015032 are all 7-digit numbers. 10012458 is an 8-digit number. The given numbers in ascending order are: Page No 8:Question 14:Arrange the following numbers in ascending order: Answer:893245, 893425 and 980134 are all 6-digit numbers. 1020216, 1020304 and 1021403 are all 7-digit numbers. The given numbers in ascending order are: Page No 11:Question 1:The number of persons who visited the holy shrine of Mata Vaishno Devi during last two consecutive years was 13789509 and 12976498 respectively. How many persons visited the shrine during these two years? Answer:Number of persons who visited the holy shrine in the first year = 13789509 Page No 11:Question 2:Last year, three sugar factories in a town produced 24809565 bags, 18738576 bags and 9564568 bags of sugar respectively. How many bags were produced by all the three factories during last year? Answer:Bags of sugar produced by the first factory in last year = 24809565 Page No 11:Question 3:A number exceeds 37684955 by 3615045. What is that number? Answer:New number = Sum of 37684955 and 3615045 Page No 11:Question 4:There were three candidates in an election. They received 687905 votes, 495086 votes and 93756 votes respectively. The number of invalid votes was 13849. If 25467 persons did not vote, find how many votes were registered. Answer:Total number of votes received by the three candidates = 687905 + 495086 + 93756 = 1276747 Page No 11:Question 5:A survey conducted on an Indian state shows that 1623546 people have only primary education; 9768678 people have secondary education; 6837954 people have higher education and 2684536 people are illiterate. If the number of children below the age of school admission is 698781, find the total population of the state. Answer:People who had only primary education = 1623546 Page No 11:Question 6:In a particular year a company produced 8765435 bicycles. Next year, the number of bicycles produced was 1378689 more than those produced in the preceding year. Answer:Bicycles produced by the company in the first year = 8765435 ∴ Total number of bicycles produced during these two years = 8765435 + 10144124 Page No 11:Question 7:The sale receipt of a company during a year was Rs 20956480. Next year, it increased by Rs 6709570. What was the total sale receipt of the company during these two years? Answer:Sale receipts of a company during the first year = Rs 20956480 ∴ Total number of sale receipts of the company during these two years = Rs 20956480 + Rs 27666050 Page No 11:Question 8:The total population of a city is 28756304. If the number of males is 16987059, find the number of females in the city. Answer:Total population of the city = 28756304 Page No 12:Question 9:By how much is 13246510 larger than 4658642? Answer:Required number = 13246510 ‒ 4658642 = 8587868 Page No 12:Question 10:By how much is 5643879 smaller than one crore? Answer:Required number = 1 crore ‒ 564387 ∴ 5643879 is smaller than one crore by 4356121. Page No 12:Question 11:What number must be subtracted from 11010101 to get 2635967? Answer:11010101 ‒ required number = 2635967 Thus, required number
= 11010101 ‒ 2635967 ∴ The number 8374134 must be subtracted from 11010101 to get 2635967. Page No 12:Question 12:The sum of two numbers is 10750308. If one of them is 8967519, what is the other number?
Answer:Sum of the two numbers = 10750308 ∴ The other number = 10750308 ‒ 8967519 Page No 12:Question 13:A man had Rs 20000000 with him. He spent Rs 13607085 on buying a school building. How much money is left with him? Answer:Initial amount with the man = Rs 20000000 ∴ Amount left with the man = Rs 20000000 ‒ Rs 13607085 Page No 12:Question 14:A society needed Rs 18536000 to buy a property. It collected Rs 7253840 as membership fee, took a loan of Rs 5675450 from a bank and collected Rs 2937680 as donation. How much is the society still short of? Answer:Money need by the society to buy the property = Rs 18536000 ∴ Amount of money short = Rs 18536000 ‒ (Rs 7253840 + Rs 5675450 + Rs 2937680) Page No 12:Question 15:A man had Rs 10672540 with him. He gave Rs 4836980 to his wife, Rs 3964790 to his son and the rest to his daughter. How much money was received by the daughter? Answer:Initial amount with the man = Rs 10672540 ∴ Amount received by his daughter = Rs 10672540 ‒ (Rs 4836980 + Rs 3964790) Page No 12:Question 16:The cost of a chair is Rs 1485. How much will 469 such chairs cost? Answer:Cost of one chair = Rs 1485 ∴ Cost of 469 chairs is Rs 696465. Page No 12:Question 17:How much money was collected from 1786 students of a school for a charity show if each student contributed Rs 625? Answer:Contribution from one student for the charity program = Rs 625 ∴ Rs 1116250 was collected from 1786 students for the charity program. Page No 12:Question 18:A factory produces 6985 screws per day. How many screws will it produce in 358 days? Answer:Number of screws produced by the factory in one day = 6985 ∴ The factory will produce 2500630 screws in 358 days. Page No 12:Question 19:Mr Bhaskar saves Rs 8756 every month. How much money will he save in 13 years? Answer:We know that Now, we have: ∴ Mr Bhaskar will save Rs 1365936 in 13 years. Page No 12:Question 20:A scooter costs Rs 36725. How much will 487 such scooters cost? Answer:Cost of one scooter = Rs 36725 ∴ The cost of 487 scooters will be Rs 17885075. Page No 12:Question 21:An aeroplane covers 1485 km in 1 hour. How much distance will it cover in 72 hours? Answer:Distance covered by the aeroplane in one hour = 1485 km ∴ The distance covered by the aeroplane in 72 hours will be 106920 km. Page No 12:Question 22:The product of two numbers is 13421408. If one of the numbers is 364, find the other. Answer:Product of two numbers = 13421408 ∴ The other number = 13421408 ÷ 364 Page No 12:Question 23:If 36 flats cost Rs 68251500, what is the cost of each such flat? Answer:Cost of 36 flats = Rs 68251500 ∴ Each flat costs Rs 1895875. Page No 12:Question 24:The mass of a cylinder filled with gas is 30 kg 250 g and the mass of the empty cylinder is 14 kg 480 g. How much is the mass of the gas contained in it? Answer:We know that 1 kg = 1000 g ∴ Mass of the gas
contained in the cylinder = 30.25 kg ‒ 14.48 kg Page No 12:Question 25:From a cloth 5 m long, a piece of length 2 m 85 cm is cut off. What is the length of the remaining piece? Answer:We know that 1 m = 100 cm ∴ Length of the remaining piece of cloth = 5 m ‒ 2.85 m Page No 12:Question 26:In order to make a shirt, a length of 2 m 75 cm of cloth is needed. How much length of the cloth will be required for 16 such shirts? Answer:We know that 1 m = 100 cm ∴ The length of the cloth required to make 16 shirts will be 44 m. Page No 12:Question 27:For making 8 trousers of the same size, 14 m 80 cm of cloth is needed. How much cloth will be required for each such trouser? Answer:We know that 1 m = 100 cm ∴ 1 m 85 cm of cloth will be required to make one shirt. Page No 12:Question 28:The mass of a brick is 2 kg 750 g. What is the total mass of 14 such bricks? Answer:We know that 1 kg = 1000 g Page No 12:Question 29:The total mass of 8 packets, each of the same size, is 10 kg 600 g. What is the mass of each such packet? Answer:We know that 1 kg = 1000 g Page No 12:Question 30:A rope of length 10 m has been divided into 8 pieces of the same length. What is the length of each piece? Answer:Length of the rope divided into 8 equal pieces = 10 m Page No 14:Question 1:Round each of the following
numbers to the nearest ten: Answer:(i) In 36, the ones digit is 6 > 5. (ii) In 173, the ones digit is 3 < 5. (iii) In 3869, the ones digit is 9 > 5. (iv) In 16378, the ones digit is
8 > 5. Page No 14:Question 2:Round each of the following numbers to the nearest hundred: Answer:(i) In 814, the tens digit is 1 < 5. (ii) In 1254, the tens digit is 5 = 5 (iii) In 43126, the tens digit is 2 < 5 (iv) In 98165, the tens digit is 6 > 5 Page No 14:Question 3:Round each of the following numbers to the nearest thousand: Answer:
(i) In 793, the hundreds digit is 7 > 5 (ii) In 4826, the hundreds digit is 8 > 5 (iii) In 16719, the hundreds digit is 7 > 5 (iv) In 28394, the hundreds digit is 3 < 5 Page No 14:Question 4:Round each of the following numbers to the nearest ten thousand: Answer:(i) In 17514, the thousands digit is 7 > 5 (ii) In 26340, the thousands digit is 6 > 5 (iii) In 34890,
the thousands digit is 4 < 5 (iv) In 272685, the thousands digit is 2 < 5 Page No 14:Question 5:Estimate each sum to the nearest ten: Answer:57 estimated to the nearest ten = 60 ∴ The required estimation = (60 + 30) = 90 Page No 14:Question 6:Estimate each sum to the nearest ten: Answer:43 estimated to the nearest ten = 40 Page No 14:Question 7:Estimate each sum to the nearest ten: Answer:14 estimated to the nearest ten = 10 Page No 14:Question 8:Estimate each sum to the nearest ten: Answer:86 estimated to the nearest ten = 90 Page No 14:Question 9:Estimate each sum to the nearest ten: Answer:95 estimated to the nearest ten = 100 Page No 14:Question 10:Estimate each sum to the nearest ten: Answer:77 estimated to the nearest ten =
80 Page No 14:Question 11:Estimate each sum to the nearest ten: Answer:356 estimated to the nearest ten = 360 Page No 14:Question 12:Estimate each sum to
the nearest ten: Answer:463 estimated to the nearest ten = 460 Page No 14:Question 13:Estimate each sum to the nearest ten: Answer:538 estimated to the nearest ten = 540 Page No 14:Question 14:Estimate each sum to the nearest hundred: Answer:236 estimated to the nearest hundred = 200 Page No 14:Question 15:Estimate each sum to the nearest hundred: Answer:458 estimated to the nearest hundred = 500 Page No 14:Question 16:Estimate each sum to the nearest hundred: Answer:170 estimated to the nearest hundred = 200 Page No 15:Question 17:Estimate each sum to the nearest hundred: Answer:3280 estimated to the nearest hundred = 3300 Page No 15:Question 18:Estimate each sum to the nearest hundred: Answer:5130 estimated to the nearest hundred = 5100 Page No 15:Question 19:Estimate each sum to the nearest hundred: Answer:10083 estimated to the nearest hundred = 10100 Page No 15:Question 20:Estimate each sum to the nearest thousand: Answer:32836 estimated to the nearest thousand = 33000 Page No 15:Question 21:Estimate each sum to the
nearest thousand: Answer:46703 estimated to the nearest thousand = 47000 Page No 15:Question 22:Estimate each sum to the nearest thousand: Answer:Number of balls in box A = 54 Page No 15:Question 23:Estimate each difference to the nearest ten: Answer:We have, Page No 15:Question 24:Estimate each difference to the nearest ten: Answer:100 estimated to the nearest ten = 100 Page No 15:Question 25:Estimate
each difference to the nearest ten: Answer:409 estimated to the nearest ten = 410 Page No 15:Question 26:Estimate each difference to the nearest hundred: Answer:678 estimated to the nearest hundred = 700 Page No 15:Question 27:Estimate each difference to the nearest hundred: Answer:957 estimated to the nearest hundred = 1000 Page No 15:Question 28:Estimate
each difference to the nearest hundred: Answer:7258 estimated to the nearest hundred = 7300 Page No 15:Question 29:Estimate each difference to the nearest hundred: Answer:5612 estimated to the
nearest hundred = 5600 Page No 15:Question 30:Estimate each difference to the nearest thousand: Answer:35863 estimated to the nearest thousand = 36000 Page No 15:Question 31:Estimate each difference to the nearest thousand: Answer:47005 estimated to the nearest thousand = 47000 Page No 15:Question 1:Estimate each of the following products by rounding off each
number to the nearest ten: Answer:38 estimated to the nearest ten = 40 Page No 15:Question 2:Estimate each of the following products by rounding off each number to the nearest ten: Answer:54 estimated to the nearest ten = 50 Page No 15:Question 3:Estimate each of the following products by rounding off each number to the nearest ten: Answer:28 estimated to the nearest ten = 30 Page No 15:Question 4:Estimate each of the following products by rounding off each number to the nearest ten: Answer:42 estimated to the nearest ten = 40 Page No 15:Question 5:Estimate each of the following products by rounding off each number to the nearest ten: Answer:64 estimated to the nearest ten = 60 Page No 15:Question 6:Estimate each of the following products by rounding off each number to the nearest ten: Answer:15 estimated to the nearest ten = 20 Page No 16:Question 7:Estimate
each of the following products by rounding off each number to the nearest hundred: Answer:376 estimated to the nearest hundred = 400 Page No 16:Question 8:Estimate each of the following products by rounding off each
number to the nearest hundred: Answer:264 estimated to the nearest hundred = 300 Page No 16:Question 9:Estimate each of the following products by rounding off each number to the nearest hundred: Answer:423 estimated to the nearest hundred = 400 Page No 16:Question 10:Estimate each of the following products by rounding off each number to the nearest hundred: Answer:509
estimated to the nearest hundred = 500 Page No 16:Question 11:Estimate each of the following products by rounding off each number to the nearest hundred: Answer:392 estimated to the nearest hundred = 400 Page No 16:Question 12:Estimate each of the following products by rounding off each number to the nearest hundred: Answer:271 estimated to the nearest hundred = 300 Page No 16:Question 13:Estimate each of the following products by rounding off the first number upwards and the second number downwards: Answer:183 estimated upwards = 200 Page No 16:Question 14:Estimate each of the following products by rounding off the first number upwards and the second number downwards: Answer:267 estimated upwards = 300 Page No 16:Question 15:Estimate each of the following products by rounding off the first number upwards and the second number downwards: Answer:359 estimated upwards = 400 Page No 16:Question 16:Estimate each of the following products by rounding off the first number upwards and the second number downwards: Answer:472 estimated upwards = 500 Page No 16:Question 17:Estimate each of the following products by rounding
off the first number upwards and the second number downwards: Answer:680 estimated upwards = 700 Page No 16:Question 18:Estimate each of the following products by rounding off the first number upwards and the second number
downwards: Answer:255 estimated upwards = 300 Page No 16:Question 19:Estimate each of the following products by rounding off the first number downwards and the second number upwards:
Answer:356 estimated downwards = 300 Page No 16:Question 20:Estimate each of the following products by rounding off the first number downwards and the second number upwards: Answer:472 estimated downwards = 400 Page No 16:Question 21:Estimate each of the following products by rounding off the first number downwards and the second number upwards: Answer:578 estimated downwards = 500 Page No 16:Question 1:Find the estimated quotient for each of the following: Answer:87 ÷ 28 is approximately equal to 90 ÷ 30 = 3. Page No 16:Question 2:Find the estimated quotient for each of the following: Answer:The estimated quotient for 83 ÷ 17 is approximately equal to 80 ÷ 20 = 8 ÷ 2 = 4. Page No 16:Question 3:Find the estimated quotient for each of the following: Answer:The estimated quotient of 75 ÷ 23 is approximately equal to 80 ÷ 20 = 8 ÷ 2 = 4. Page No 16:Question 4:Find the estimated quotient for each of the
following: Answer:The estimated quotient of 193 ÷ 24 is approximately equal to 200 ÷ 20 = 20 ÷ 2 = 10. Page No 16:Question 5:Find the estimated quotient for each of the following: Answer:The estimated quotient of 725 ÷ 23 is approximately equal to 700 ÷ 20 = 70 ÷ 2 = 35. Page No 16:Question 6:Find the estimated quotient for each of the following: Answer:The estimated quotient of 275 ÷ 25 is approximately equal to 300 ÷ 30 = 30 ÷ 3 = 10. Page No 16:Question 7:Find the estimated quotient for each of the following: Answer:The estimated quotient of 633 ÷ 33 is approximately equal to 600 ÷ 30 = 60 ÷ 3 = 20. Page No 16:Question 8:Find the estimated quotient for each of the following: Answer:729 ÷ 29 is approximately equal to 700 ÷ 30 or 70 ÷ 3, which is approximately equal to 23. Page No 16:Question 9:Find the estimated quotient for each of the following: Answer:858 ÷ 39 is approximately equal to 900 ÷ 40 or 90 ÷ 4, which is approximately equal to 23. Page No 16:Question 10:Find the estimated quotient for each of the following: Answer:868 ÷ 38 is approximately equal to 900 ÷ 40 or 90 ÷ 4, which is approximately equal to 23. Page No 19:Question 1:Express each of the following as a Roman numeral: Answer:We may write these numbers as given below: Page No 19:Question 2:Express each of the following as a Roman numeral: Answer:We may write these numbers in Roman numerals as follows: (i) 164 = (100 + 50 + 10 + 4) = CLXIV Page No 19:Question 3:Write each of the following as a Hindu-Arabic numeral: Answer:We can write the given Roman numerals in Hindu-Arabic numerals as follows: (i) XXVII = 10 + 10 + 7 = 27 Page No 19:Question 4:Show that each of the following is meaningless. Give reason in each case. Answer:(i) VC is wrong because V, L and D are never subtracted. Page No 20:Question 1:Mark against the correct answer Answer:Option c is correct. Place value of 6 = 6 lakhs = (6 × 100000) = 600000 Page No 20:Question 2:Mark against the correct answer Answer:Option a is correct. The face value of a digit remains as it is irrespective of the place it occupies in the place value chart. Page No 20:Question 3:Mark against the correct answer Answer:Option c is correct. Place value of 5 = 5 × 10000 = 50000 ∴ Required difference = 50000 − 5 = 49995 Page No 20:Question 4:Mark against the correct answer Answer:Option b is correct. The smallest counting number is 1. Page No 20:Question 5:Mark against the correct answer Answer:Option b is correct. The largest four-digit number = 9999 Page No 20:Question 6:Mark against the correct answer Answer:Option b is correct. The largest seven-digit number = 9999999 Page No 20:Question 7:Mark against the
correct answer Answer:Option c is correct. The largest eight-digit number = 99999999 Page No 20:Question 8:Mark against the correct answer Answer:Option b is correct. The number just before 1000000 is 999999 (i.e., 1000000 − 1). Page No 20:Question 9:Mark against the correct answer Answer:Option a is correct. V, L and D are never subtracted. Thus, VX is wrong. Page No 20:Question 10:Mark against the correct answer Answer:Option c is correct. I can be subtracted from V and X only. Thus, IC is wrong. Page No 20:Question 11:Mark against the correct answer Answer:Option b is correct. V, L and D are never repeated. Thus, XVV is meaningless. Page No 21:Question 1:Write each of the following numerals in words: Answer:(i) Sixteen crore six lakh twenty-three thousand seven hundred eight Page No 21:Question 2:Write each of the following numerals in words: Answer:(i) Eighty million sixty thousand four hundred nine Page No 21:Question 3:Arrange the following numbers in ascending order: Answer:We have, 3903216 and 6940513 are seven-digit numbers.
16531079 and 19430124 are eight-digit numbers. The given numbers in ascending order are: Page No 21:Question 4:Arrange the following numbers in descending
order: Answer:63240613 and 54796203 are both eight-digit numbers. 5125648 and 4675238 are both seven-digit numbers. 589623 is a six-digit number. The given numbers in descending order are: Page No 21:Question 5:How many 7-digit numbers are there in all? Answer:The largest seven-digit number = 9999999 Hence, there is a total of ninety lakh 7-digit numbers. Page No 21:Question 6:Write the largest and smallest numbes using each of the digits 1, 4, 6, 8, 0 only once and find their difference. Answer:The largest number using each of the digits: 1, 4, 6, 8 and 0, is 86410. Page No 21:Question 7:Write the Hindu-Arabic numeral for each of the following: Answer:(i) CCXLII = 100 + 100 + (50 − 10) + 2 = 242 Page No 21:Question 8:Write the Roman numeral for each of the following: Answer:(i) 84 = 50 + 30 + 4 = LXXXIV Page No 21:Question 9:Write the successor and predecessor of 999999 and find their difference. Answer:Successor of 999999 = 999999 + 1 = 1000000 Page No 21:Question 10:Round off each of the following to the nearest thousand: Answer:(i) The number is 1046. Its digit at the hundreds place is 0 < 5. (ii) The number is 973. Its digit at the hundreds place is 9 > 5. (iii) The number is 5624. Its digit at the hundreds place is 6 > 5. (iv) The number is 4368. Its digit at the hundreds place is 3 < 5. Page No 21:Question 11:Which of
the following Roman numerals is correct? Answer:Option (a) is correct. X can be subtracted from L and C only. Page No 21:Question 12:1 Lakh = ...... thousands. Answer:Option (b) is correct. One lakh (100000) is equal to one hundred thousand (100,000). Page No 21:Question 13:No Roman numeral can be repeated more than ..... times. Answer:Option (b) is correct. No Roman numeral can be repeated more than three times. Page No 21:Question 14:How many times does the digit 9 occur between 1 and 100? Answer:Option (d) is correct. Between 1 and 100, the digit 9 occurs in 9, 19, 29, 39, 49, 59, 69, 79, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98 and 99. Page No 21:Question 15:(7268 − 2427) estimated to the nearest hundred is Answer:Option (a) is correct. 7268 will be rounded off to the nearest hundred as 7300. Page No 21:Question 16:One million = ...... . Answer:Option (b) is correct. 1 million (1,000,000) = 10 lakh (10 × 1,00,000) Page No 21:Question 17:1512 when round off to the nearest hundred is Answer:Option (b) is correct. The number is 1512. Its digit at the tens place is 1 < 5. Page No 21:Question 18:Which of the symbols are never repeated? Answer:Option (c) is correct. In Roman numerals, V, L and D are never repeated and never subtracted. Page No 21:Question 19:Write 86324805 separating periods in HIndu-Arabic system. Answer:Periods:
Crores Lakhs Thousands Hundreds Tens Ones Using commas, we write the given number as 8,63,24,805. Page No 21:Question 20:Fill
in the blanks: Answer:(i) 1 crore = 100 lakh Page No 22:Question 21:Write 'T' for true and 'F' for false Answer:F Place value of 5 in 85419 = 5000 Page No 22:Question 22:Write 'T' for true and 'F' for false Answer:T In Roman numerals, V, L and D are never repeated and never subtracted. Page No 22:Question 23:Write 'T' for true and 'F' for false Answer:T Page No 22:Question 24:Write 'T' for true and 'F' for false Answer:T The number is 46,530. Its digit at the tens place is 3 < 5. Page No 22:Question 25:Write 'T' for true and 'F' for
false Answer:View NCERT Solutions for all chapters of Class How many numbers between 1000 and 9999 have no repeated digits?Thus, the number of natural numbers = 9 × 9 × 8 × 7 = 4536. Therefore, 4536 natural numbers out of 9000 numbers have all the 4 digits that are unique. Therefore, rest numbers must have digits that are repeated.
What are the first 3 even numbers?We know that the even numbers are the numbers, which are completely divisible by 2. They are 2, 4, 6, 8,10, 12,14, 16 and so on.
How many numbers between 200 and 1200 can be formed with the digits 0 1 2 3 repetition of digits not allowed?How many numbers between 200 and 1200 can be formed with the digits 0,1,2,3 (repetition of digits not allowed ) ? I divided it in 3 digit and 4 digit numbers. For these their are 2×3×2=12 ways.
What is 1 into even number of times?CBSE, JEE, NEET, NDA. If you are multiplying (-1) into even times the result will comes 1.
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