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Mathematics Activity :
Composite Numbers and Prime Numbers

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How many prime numbers are there up to 20?

8


1.

What is the sum of the prime numbers between 20 and 30?
 

2.

How many prime numbers are there between 1 and 10?
 

3.

Which is the prime number between 90 and 100?
 

4.

How many even prime numbers between 1 and 50?
 

5.

How many prime numbers are there up to 50?
 

6.

How many prime numbers are there from 30 to 50?
 

7.

How many composite numbers are there from 61 to 79?
 

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