Learning Math: Composite Numbers and Prime Numbers

Mathematics Activity :
Composite Numbers and Prime Numbers

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How many even prime numbers between 1 and 50?
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1.	How many prime numbers are there between 1 and 10?


2.	How many composite numbers are there from 61 to 79?


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


4.	7 is a prime factor of 133. What is the other prime factor?


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


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


7.	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?