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EducationPrime or Composite Number?
By vcammel
Category: Education. Viewed 3443 times. Created March 2015.     Disclaimer.    Privacy info.
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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