Numbers Worksheet-28

Numbers Worksheet-28

1. Which of the following is not a rational number?

(a) –1                  (b)                 (c) 0                    (d) 3.6

2. Which of the following is an irrational number?

(a) 0.12357...    (b) 3.14              (c) –1/9              (d) –1

3. Which of the following term describes

(a) Rational number                   (b) Irrational number

(c) Whole number                       (d) Real number

4. Which term describes ¾?

(a) A whole number                     (b) Prime number

(c) Rational number                    (d) Irrational number

5. I can be expressed as a _____.

(a) Natural number                     (b) Fractional number

(c) Irrational number                  (d) Composite number

6. Is 3p2/2 a Rational Number?

(a) Yes                                             (b) No

(c) Depends on p2                        (d) Only in positive forms

7. p is actually as non-ending decimal and is ______.

(a) An irrational number

(b) A rational number

(c) A terminating decimal number   

(d) A prime number

8. What do you call the number that has exactly two factors, 1 and itself?

(a) Natural numbers                   (b) Perfect numbers

(c) Composite numbers              (d) Prime numbers

9. If a number is even, and is divisible by 3, then what is true about that number?

(a) It will be divisible by 5.         (b) It will be divisible by 6.

(c) It will be divisible by 4.         (d) It will be divisible by 8.

10. Which of the following numbers is divisible by 11?

(a) 5,435                                         (b) 70,169,308

(c) 911,153                                      (d) 1,351

11. Which is an example of twin prime numbers?

(a) 11, 17             (b) 5, 11              (c) 3, 7                (d) 3, 5

12. Which one of the following numbers is a Prime number?

147, 123, 167, 117

(a) 123                (b) 117                (c) 147                (d) 167

13. What do you call the two numbers, which have only 1 as a common factors?

(a) Odd numbers                          (b) Prime numbers

(c) Even numbers                         (d) Co-Prime numbers

14. What least value should be filled in the box, so that the number 52 ◻ 3 is divisible by 9 ?

(a) 0                    (b) 3                    (c) 8                    (d) 6

15. If an even number is divided by 2, then the quotient is _____.

(a) always an Odd number

(b) always an even number

(c) either odd or an even number

(d) neither odd nor an even number

16. The number 5,258 is divisible by which of the following numbers?

(a) 3                    (b) 6                    (c) 11                   (d) 9

17. Which one is the perfect number ?

(a) 7                    (b) 15                  (c) 28                  (d) 2

18. What is TRUE about the number 1?

(a) It is a composite number

(b) It is both a prime and composite number

(c) It is a prime number

(d) It is neither prime nor a composite number

19. Which are the two prime numbers whose difference is 2?

(a) 13 and 15     (b) 7 and 9         (c) 3 and 5         (d) 21 and 23

20. Which statement is NOT correct?

(a) '1' is a factor of every number.

(b) Every number is a multiple of '1' and itself.

(c) The prime numbers have only two factors.

(d) Not every number is a multiple of each of its factors.

Answer Key:

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