Secondary School (English Medium) (5 to 8) Class 6 - CBSE Question Bank Solutions

Find if the following number is a prime number:
87

Find if the following number is a prime number:
89

Find if the following number is a prime number:
63

Find if the following number is a prime number:
91

What are co-primes?

Give examples of five pairs of co-primes.

Are co-primes always primes? If no, illustrate your answer by an example.

Express the following number as the sum of two odd prime:
36

Express the following number as the sum of two odd prime:
42

Express the following number as the sum of two odd prime:
84

Express the following number as the sum of two odd prime:
98

Express the following odd number as the sum of three odd prime number:
31

Express the following odd number as the sum of three odd prime number:
35

Express the following odd number as the sum of three odd prime number:
49

Express the following odd number as the sum of three odd prime number:
63

Express the following number as the sum of twin prime:
36

Express the following number as the sum of twin prime:
84

Express the following number as the sum of twin prime:
120

Express the following number as the sum of twin prime:
144

State the following statement is True or False.
1 is the smallest prime number.