Prime Numbers - Dont divide by anything, all prime numbers **end** in either: **1,3,7,9**

BUT **1** IS **NOT** A PRIME NUMBER!

Multiples - the multiples of a number are simply its** time table!**

**For example**: The Multiples of **1** are... **1 2 3 4 5 6 7 8 9 10**....

Factors - The factors of a number are all the numbers that divdie into it.

**For example**: The factors of ten are...1,10 2,5.

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