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EducationPrime or Composite Number?
By vcammel
Category: Education. Viewed 4286 times. Created March 2015.     Disclaimer.   
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How to tell if a number is Prime or Composite
               
Is the number even (ends in 0, 2, 4, 6 or 8)
NO
 Is the number divisible by 3 (add the digits of the number - if sum is a multiple of 3 then ...)
NO
 Is the number divisible by 5 (ends in 0 or 5)
NO
 Is the number divisible by 7 (do the math)
NO
 The number is Prime (can only be multiplied by itself and 1)

YES

YES

YES

YES

The number is Composite
The number is Composite
The number is Composite
The number is Composite