Numbers Worksheet-29

Numbers Worksheet-29

1. Which option shows 7 consecutive Composite numbers less than 100?

(a) 40-46           (b) 60-66           (c) 70-76            (d) 90-96

2. If the sum of the digits of a number is divisible by 9, what is definitely true about that number?

(a) It will be divisible by 2.         (b) It will be divisible by 4.

(c) It will be divisible by 9.         (d) It will be divisible by 6.

3. Which of these is a composite number?

(a) 133                (b) 173                (c) 131                 (d) 79

4. The sum of any two odd numbers is _____.

(a) Odd number                           (b) Prime number

(c) Even number                          (d) Both, odd and even

5. Every prime number except ____, is odd.

(a) 1                     (b) 2                    (c) 4                    (d) 3

6. Which option shows a pair of twin primes that is greater than 130 and less than 140?

(a) 131 and 133                             (b) 137 and 139

(c) 133 and 135                             (d) 130 and 140

7. Which one of the following numbers are coprime numbers?

(a) 6 and 15                                    (b) 9 and 21

(c) 18 and 27                                 (d) 6 and 35

8. Which of the following is not a natural number?

(a) 7                    (b) −8                 (c) 12                  (d) 67

9. Which is the same as 45(12 − 7) = ?

(a) (45 − 7) × (45 − 13)               (b) 57 − 7

(c) (45 × 12) × (45 × 7)               (d) (45 × 12) − (45 × 7)

10. 654 × (182 − 82) = ?

(a) 75,400         (b) 65,400         (c) 65,4000       (d) none

11. Which statement is NOT correct?

(a) The Commutative Property is true for multiplication.

(b) The Commutative Property is true for addition.

(c) The Commutative Property is true for subtraction.

(d) The Commutative Property is not true for division.

12. A number is divisible by 8 if the number formed by the last three digits is divisible by ______.

(a) 2                    (b) 4                    (c) 6                    (d) 8

13. Which of these are two consecutive numbers after 80009?

(a) 800100, 80011                       (b) 80010, 800011

(c) 80010, 80011                          (d) 8010, 8011

14. 56(4 + 2) = (56 × 4) + (56 × 2) is an example of the _____.

(a) closure property of whole number

(b) commutative property of whole number

(c) associative property of whole number

(d) distributive property of whole number

15. Which is an example of Commutative Property?

(a) 21 × 1 = 21                               (b) 5 ×(6 + 7) = 5 × 6 + 5 × 7

(c) 12 + 32 = 32 + 12                   (d) 12 + 0 = 12

16. What least number should be subtracted from 1,222 to get a number exactly divisible by 42?

(a) 12                  (b) 3                    (c) 1                     (d) 4

17. Which of the following is an example of Associative property of addition?

(a) a + (b+c) = ab + ac               (b) a + (b + c) = b(a + c)

(c) a + (b + c) = (a + b) + c        (d) (a + b) × c

18. Which of the following is the smallest natural number?

(a) 2                    (b) 0                    (c) 1                     (d) does not exist.

19. Which of the following property is applicable to addition of whole numbers?

(a) Associative property             (b) Closure property

(c) Commutative property         (d) All of these

20. Which are the three whole numbers just before 5982901?

(a) 5982900, 5982999, 5982989

(b) 5982911, 5982912, 5982913

(c) 5982900, 5982899, 5982898

(d) 5981900, 5981999, 5981298

Answer Key:

(1)-(d); (2)-(c); (3)-(a); (4)-(c); (5)-(b); (6)-(b); (7)-(d); (8)-(b); (9)-(d); (10)-(b); (11)-(c); (12)-(d); (13)-(c); (14)-(d); (15)-(c); (16)-(d); (17)-(c); (18)-(c); (19)-(d); (20)-(c)