Thursday, October 22, 2015

Prime and Composite Numbers

In our prime and composite numbers unit we looked at some prime and composite numbers. Some prime numbers are 2, 3, 5, 7, 11 (ok that’s all I will list). Prime numbers are numbers with only two factors 1 and itself. Some composite numbers are 4, 6, 8, 9, 10 (ok that’s all I will list). Composite numbers’ definition is it has more than two factors.  We used arrays to figure out if the numbers were prime or composite because if the number only had two arrays then it was prime. If it had more than two arrays then it was composite.

EX: 11:1,11 See that is a prime number.
EX : 100: 1,2,4,5,10,20,50,100  See that is a composite number.

 - Aayan

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