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Mathematics Activity :
Composite Numbers and Prime Numbers

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7 is a prime factor of 133. What is the other prime factor?

19


1.

How many even prime numbers between 1 and 50?
 

2.

What is the sum of the prime numbers coming immediately before and after 71?
 

3.

How many prime numbers are there between 1 and 10?
 

4.

What is the sum of the prime numbers coming immediately before and after 50?
 

5.

Two prime numbers whose difference is 2 are called twin prime numbers, e.g., 3 and 5. How many twin prime numbers are there upto 50?
 

6.

How many pairs of prime numbers are there to express 18 as the sum of two prime numbers?
 

7.

How many pairs of prime numbers are there to express 20 as the sum of two prime numbers?
 


 
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