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Mathematics Activity :
Composite Numbers and Prime Numbers

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How many prime numbers are there from 30 to 50?

5


1.

How many pairs of prime numbers are there to express 24 as the sum of two prime numbers?
 

2.

How many prime numbers are there up to 50?
 

3.

How many prime numbers are there between 50 and 100?
 

4.

How many prime numbers are there between 1 and 10?
 

5.

How many prime numbers are there up to 20?
 

6.

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

7.

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


 
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