Learning Math: Composite Numbers and Prime Numbers

Mathematics Activity :
Composite Numbers and Prime Numbers

Quick Reference
Type your answers in the input boxes below.

Fill in the blanks

Your Performance

How many prime numbers are there up to 20?
8

1.	7 is a prime factor of 133. What is the other prime factor?


2.	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?


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


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


5.	How many prime numbers are there between 50 and 100?


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 between 50 and 100?