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Mathematics Activity :
Composite Numbers and Prime Numbers

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What is the smallest composite number?

4


1.

How many prime numbers are there between 1 and 10?
 

2.

Which of the following is a composite number: 37, 47, 57, 67?
 

3.

What is the difference between the fifth and the second prime numbers coming after 7?
 

4.

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

5.

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

6.

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

7.

11 is a prime factor of 187. What is the other prime factor?
 


 
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