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Numbers Class 6 - 1

Level 1

Comparing Numbers

1. Which of the following numbers is the largest?a. 3785b. 5684c. 7980d. 9423

2. Which of the following numbers is the smallest?a. 1367b. 2785c. 7654d. 4784

3. Find the largest number from the following numbers.a. 678b. 5674c. 25649d. 5870

4. Using the following digits without repetition, make the smallest and the largest 4 digitnumbers.

a. 1, 4, 6, 9b. 5, 0, 3, 8c. 4, 4, 8, 9d. 4, 0, 3, 0

5. Arrange the following numbers into ascending order:a. 2635, 1897, 2854, 3975b. 847, 9754, 571, 8320

6. Arrange the following numbers in descending order:a. 7685, 4536, 9075, 2007b. 536, 8769, 983, 5647

7. Make the greatest and the smallest 4-digit numbers by using one of the digits twicea. 7, 4, 3b. 0, 8, 3c. 5, 8, 1

8. What number is obtained if we exchange the digits at 10th place with the one at thousandthplace in the number 4827?

a. 2487b. 2847c. 2748d. 2478

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9. What is the largest 4- digit number formed using the digits 2 and 3, taking both the digits equalnumber of times?

10.What is the largest number obtained using four different digits such that 6 is always at onesplace?

11.Which of the following numbers is 156 more than the largest three digit number?a. 1167b. 2356c. 1155d. 1156

12.Expand 6792 using the concept of place values.a. 2*1000 + 9*100 + 7*10 + 2b. 6*1000 + 7*100 + 9*10 + 6c. 6*1000 + 7*100 + 9*10 + 2d. None of these.

13.Which of the following numbers is larger than the smallest five digit number?a. 18653b. 39745c. 56432d. Alle. None

14.What must be subtracted from the largest four digit number to make it 678 less than thesmallest five digit number?

a. 678b. 679c. 677d. 666

15.A = 10*99; B = 11*98; C = 12*97Which of the following is true?

a. A>B>Cb. ACc. C>B>Ad. B>C>A

Indian & International System of representing Number

1. Fill in the blanks:a. 1 lakh = _______ ten thousandb. 1 million = ________ hundred thousandc. 1 crore = _______ ten lakhd. 1 crore = _______ millione. 1 million ________lakh

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2. Which of the following is the correct representation for eight crore seventy five lakh, ninety fivethousand, seven hundred and sixty two?

a. 87595762b. 8*10000000 + 7*1000000 + 5*100000 + 9*10000 + 5*1000 + 7*100 + 6*10 + 2c. 87, 595, 762d. All

3. Insert commas to write the following numbers in Indian System of Numerationa. 859734511b. 6754453

4. Insert commas to write the following numbers in International system of representationa. 7453865b. 3425679

5. Which of the following numbers represent three hundred seventy five million, six hundred fortyseven thousand two hundred and three?

a. 375647203b. 3756472003c. 3750647203d. 37506472003

Estimates

1. Which of the following numbers is nearest to 500?a. 497b. 502c. 499d.

503

2. Which of the following numbers would give a zero when rounding off to the nearest 1000?a. 445b. 501c. 1082d. None

3. Estimate (798-316) using the general rule by rounding off closest to hundred.a. 500b. 400c. 600d. 300

4. Make a better estimate in the above problem by rounding off to the nearest ten.a. 480b. 470c. 490d. 510

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5. Estimate the product of 578 and 161 using the general rule (by rounding off to the nearesthundred.)

a. 120000b. 140000c. 102000d. 112000

Brackets

1. Five multiplied by the sum of nine and two isa. 5 + 9*2b. 5*9 + 2c. (5 + 9)*2d. 5*(9 +2)

2. What is the value of 3* (4+7)a. 19b. 33c. 25d. None

3. 102*103 can be represented as:a. 102*(100+2)b. (100+2)*103c. (100+2)*(100+3)d. All of the above

4. Sohani and Reeta work for six days each. Sohani works for 5 hours a day while Reeta works for 8hours a day. How many hours do both of them work in total?

a. 38b. 65c. 6*(5 + 8)d. None

5. (35+5)*(45+5) is equal toa. 2000b. 265c. 1585d. None

6. There are eight rows of plants in a nursery. Each row contains 10 roses. If the number of rows isincreased by 23 and the number of roses in each in each row is increased by 7, find the total

number of roses present in the nursery now.

a. (23+8)(10+7)b. 310c. (23+7)(10+8)d. 517

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a. 1998b. 1996c. 2000d. 1990

3. Add 4 and 2 on a number line.4. Subtract 5 from 7 on a number line.5. Multiply 4 and 3 on a number line.6. Which of the following statement are incorrect?

a. The numbers lying to the right of a particular number on the number line are greaterthan that number.

b. The numbers lying to the left of a particular number on the number line are smaller thanthat number.

c. The number line for whole numbers extends indefinitely in only one direction.d. From number line, we infer 7 > 4.e. None

Properties of Whole Numbers

1. The sum of two whole numbers is a whole number. This is called closure property for addition.Whole numbers are closed for which of the following operations?

a. Subtractionb. Multiplicationc. Divisiond. None

2. Which of the following is not possible?a.

2+0

b. 2-0c. 2*0d. 20

3. What does commutative law for addition says?a. We can add whole numbers in any order.b. We cant divide a whole number by zero.c. The sum of two whole numbers is a whole number.d. None of these.

4. Is the commutative law valid for multiplication also?a. Yesb. Noc. Only if one of the multiplicands is zero.d. Only if none of the multiplicand is zero.

5. Which of the following is true?a. Subtraction is commutative for whole numbers.b. Since multiplication is repeated addition, it is commutative for whole numbers.

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Factors and Multiples

1. Which of the following statements are true?a. Every factor of a number is less than or equal to the given number.b. A factor is an exact divisor of that number.c. 1 is a factor of every number.d. All of the above.

2. Which one of the following is not a factor of 36?a. 2b. 9c. 12d. 16

3. The factor of 729 among the following isa. 61b. 72c. 81d. 92

4. Ho w many factors can a number have?a. 2b. 1c. Infinited. Depends on the number

5. Find out the correct statement from among the following.a. Every number is a multiple of itself.b. Every number is a multiple of its factors.c. Every multiple of a number is greater than or equal to that number.d. All of the above.

6. How many multiples of 17 are there which are less than 100?a. 3b. 4c. 5d. 6

7. Which one of the following is a multiple of 15?a. 15b. 30c. Both a and bd. 35

8. How many factors does the number 30 have?a. 6b. 7c. 8d. 9

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9. Which of the following is a multiple of 59?a. 118b. 126c. 176d. 196

10.The largest factor of 69 isa. 13b. 26c. 39d. 69

Prime and Composite Numbers

1. Which of the following numbers is not prime?a. 23b. 47c. 2d. 1

2. Which of the following statements is not true?a. The number 2 is smallest prime number.b. Two numbers with only one common factor are called co prime numbers.c. The sum of two prime numbers is an even number.d. A number divisible by two co-prime numbers is divisible by their product also.

3. Which of the following is a prime number?a. 21b.

25

c. 23d. 27

4. Which of the following numbers is composite?a. 19b. 23c. 27d. 31

5. Which is the smallest prime number greater than 100?a. 101b. 103c. 105d. 107

6. The numbers 3 and 5 area. Co-primeb. Twin-primec. Both a and b

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d. NoneTest for divisibility of Numbers

1. Which of the numbers is divisible by 10?a. 678b. 4563c. 9770d. 34569

2. Which of the following numbers is divisible by 2?a. 23b. 45c. 67d. 64


4. Which of the following is divisible by 4?a. 3216b. 6574c. 3486d. 9781

5. Which of the following numbers is divisible by 5?a.

6743

b. 8628c. 4565d. 8624

6. Find the number among the following which is divisible by 6.a. 4563b. 7642c. 6731d. 8736


8. Which of the following numbers is divisible by 9?a. 6750b. 5439

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Common Factors and Common Multiples

1. What are the common factors of 22 and 121?a. 1, 2, 11b. 1, 11c. 1d. 1, 22, 121

2. Which among the following is a common multiple of 22 and 121?a. 11b. 22c. 242d. 111

3. Two numbers which dont have a common factor other than 1 are calleda. Twin primesb. Co primesc. Twin numbersd. None

4. A number which is divisible by 5 and 6 would be divisible bya. 45b. 78c. 60d. 67

5. If a number is divisible by 3 and 31 both, then it must be divisible bya. 63b. 34c. 28d. 13

HCF & LCM

1. What is the HCF of two consecutive odd numbers?a. 1b. 3c. 4

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d. 22. What is the HCF of 30 and 42?

a. 3b. 6c. 9d. 7

3. What is the GCD of 70, 105, 175?a. 5b. 7c. 35d. None

4. What is the LCM of 20, 25 and 30?a. 100b. 200c. 300d. 400

5. The LCM of 24 and 96 isa. 24*96b. 4*96c. 6*96d. 1*96

6. The smallest number divisible by 16 and 21 isa. 16*21b. 16*7c. 16*6d. 21*8

7. The smallest four digit number divisible by 18, 24 and 32 isa. 1052b. 1152c. 1168d. 1234

8. Which smallest number when divided by 6, 15 and 18 gives no remainder?a. 90b. 135c. 180d. 360

9. Renu purchases two bags of fertilizers of weights 75 kg and 69 kg. Find the maximum value ofweight which can measure the weight of fertilizers exact number of times.

a. 2 kgb. 3 kgc. 6 kgd. 9 kg

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10.Three traffic lights change after 36, 72 and 90 seconds respectively. If they changesimultaneously at 3 pm, when would they change simultaneously next time?

a. 3:04 pmb. 3:05 pmc. 3:06 pmd. 3:07 pm

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Answers:

Comparing Numbers

1. d2. a3. c4.

a. smallest: 1469; largest: 9641b. smallest: 3058; largest: 8530c. smallest: 9844; largest: 4489d. smallest: 3004; largest: 4300

5. a. 18975367.

a. smallest: 3347; largest: 7743b. smallest: 3008; largest: 8830c. smallest: 1158; largest: 8851

8. b9. 332210.987611.c12.c13.d14.c15.

c

Indian and International System of Representing Numbers

1. a to e: 102. d3. a. 85,97,34,511; b. 67,54,4534. a. 7,453,865; b. 3,425,6795. a

Estimates

1. c2. a3. a4. a5. a

Brackets

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1. d2. b3. c4. c5. a6. a7. d8. c9. a10.c

Roman Numerals

1. b2. b3. d4. b5. e6. b7. a8. a9. b10.b

Predecessors, Successors and Number Line

1. b2. a3. Do it yourself.4. Do it yourself.5. Do it yourself.6. e

Properties of Whole Numbers

1. b2. c3. a4. a5. b6. 4207. b8. b9. a

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10.a. Distribution of multiplication over additionb. Commutative property of multiplicationc. Commutative property of addition

Patterns in Whole Numbers

1. d2. b3. c

Factors & Multiples

1. d2. d3. c4. d5. d6. c7. c8. c9. a10.d

Prime & Composite Numbers

1. d2. c3. c4. c5. a6. c

Test for divisibility of Numbers

1. c2. d3.

d

4. a5. c6. d7. a8. a9. a

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10.dPrime Factorization

1. a2. b3.

a. 3*3*3*23b. 2*2*5*7*7c. 7*13*19d. 2*2*2*7

4. b5. 3, 2

Common Factors & Common Multiples

1. b2. c3. b4. c5. a

HCF & LCM

1. a2. b3. c4. c5. d6. a7. b8. a9. b10.c

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