Prime and Composite Numbers

Author:Kusum Wadhwa & Anju Loomba
5th CBSE
IMPORTANT

Important Questions on Prime and Composite Numbers

EASY
IMPORTANT

Express the following composite numbers as the sum of two prime numbers.

42=___ + ____

EASY
IMPORTANT

Express the following composite numbers as the sum of two prime numbers.

24=___ + ____

EASY
IMPORTANT

Express the following composite numbers as the sum of two prime numbers.

16=___ + ____

MEDIUM
IMPORTANT

Express the following composite numbers as the sum of two prime numbers.

12=___ + ____

EASY
IMPORTANT

Use the grid below to answer the following question.

Question Image

____ and ___ are the only two consecutive prime numbers before 100.

MEDIUM
IMPORTANT

Shobha is not clear about some concepts of factors and multiples. She has written the wrong statement. Help her write the correct statement.

Wrong statement Correct statement
23 is a composite number. 23 is a _____ number.

MEDIUM
IMPORTANT

Shobha is not clear about some concepts of factors and multiples. She has written the wrong statement. Help her to write the correct statement.

Wrong statement Correct statement
 51 is a prime number 51 is a _____ number

MEDIUM
IMPORTANT

Answer the following question.
What is the smallest odd prime number?
 

MEDIUM
IMPORTANT

Answer the following questions.
What is the smallest composite number?
 

MEDIUM
IMPORTANT

What is the smallest prime number?

MEDIUM
IMPORTANT

Answer the following question.
Is every odd number a prime number?
 

MEDIUM
IMPORTANT

Look at the numbers given on the dart game. They are all prime numbers. Fill in the prime numbers, which when added given you these even numbers.

Question Image 

_____=28

HARD
IMPORTANT

Look at the numbers given on the dart game. They are all prime numbers. Fill in the prime numbers, which when added given you these even numbers.

Question Image 

_____=8

EASY
IMPORTANT

Look at the numbers given on the dart game. They are all prime numbers. Fill in the prime numbers, which when added given you these even numbers.

Question Image 

_____=10

MEDIUM
IMPORTANT

Look at the numbers given on the dart game. They are all prime numbers. Fill in the prime numbers, which when added given you these even numbers.

Question Image 

_____=14

MEDIUM
IMPORTANT

Look at the numbers given on the dart game. They are all prime numbers. Fill in the prime numbers, which when added given you these even numbers.

Question Image 

_____=12

MEDIUM
IMPORTANT

Look at the numbers given on the dart game. They are all prime numbers. Fill in the prime numbers, which when added given you these even numbers.

Question Image 

_____=20

EASY
IMPORTANT

Use the grid below to answer the following question.

1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
61 62 63 64 65 66 67 68 69 70
71 72 73 74 75 76 77 78 79 80
81 82 83 84 85 86 87 88 89 90
91 92 93 94 95 96 97 98 99 100

The greatest prime number before 50 is?

EASY
IMPORTANT

Use the grid below to answer the following question.

1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
61 62 63 64 65 66 67 68 69 70
71 72 73 74 75 76 77 78 79 80
81 82 83 84 85 86 87 88 89 90
91 92 93 94 95 96 97 98 99 100

The smallest odd composite number is?

EASY
IMPORTANT

Identify the only prime number which is even.