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

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?
2

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


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.	What is the smallest composite number?


4.	11 is a prime factor of 187. What is the other prime factor?


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


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


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