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Mathematics Activity :
Composite Numbers and Prime Numbers

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How many composite numbers are there from 61 to 79?

14


1.

How many prime numbers are there from 30 to 50?
 

2.

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

3.

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

4.

What is the difference between the greatest and the smallest prime numbers coming in between 20 and 40?
 

5.

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

6.

Which is the prime number between 90 and 100?
 

7.

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


 
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