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Is it Prime?

In this worksheet, students revise and practise deciding whether or not a given number is prime.

'Is it Prime?' worksheet

Key stage:  KS 2

Curriculum topic:  Maths and Numerical Reasoning

Curriculum subtopic:  Special Numbers

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

Prime numbers only have two factors, 1 and the number itself.

All other whole numbers are known as composite.

 

The only even prime number is 2.

 

The list of prime numbers starts as follows:

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37........

State whether or not the following number is prime:

7

Prime

Not prime

State whether or not the following number is prime:

17

Prime

Not prime

State whether or not the following number is prime:

27

Prime

Not prime

State whether or not the following number is prime:

47

Prime

Not prime

State whether or not the following number is prime:

57

Prime

Not prime

State whether or not the following number is prime:

51

Prime

Not prime

State whether or not the following number is prime:

71

Prime

Not prime

State whether or not the following number is prime:

81

Prime

Not prime

State whether or not the following number is prime:

91

Prime

Not prime

State whether or not the following number is prime:

101

Prime

Not prime

  • Question 1

State whether or not the following number is prime:

7

CORRECT ANSWER
Prime
  • Question 2

State whether or not the following number is prime:

17

CORRECT ANSWER
Prime
  • Question 3

State whether or not the following number is prime:

27

CORRECT ANSWER
Not prime
  • Question 4

State whether or not the following number is prime:

47

CORRECT ANSWER
Prime
  • Question 5

State whether or not the following number is prime:

57

CORRECT ANSWER
Not prime
EDDIE SAYS
57 is divisible by 3.
  • Question 6

State whether or not the following number is prime:

51

CORRECT ANSWER
Not prime
EDDIE SAYS
51 is divisible by 3.
  • Question 7

State whether or not the following number is prime:

71

CORRECT ANSWER
Prime
  • Question 8

State whether or not the following number is prime:

81

CORRECT ANSWER
Not prime
  • Question 9

State whether or not the following number is prime:

91

CORRECT ANSWER
Not prime
EDDIE SAYS
91 is divisible by 7.
  • Question 10

State whether or not the following number is prime:

101

CORRECT ANSWER
Prime
---- OR ----

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