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Is 20 a prime number?


To find out if 20 is a prime number, we went through our prime number check list. Everything on our prime number check list must be true for 20 to be a prime number.

For 20 to be a prime number, it must be an integer and a positive number: True

For 20 to be a prime number, it must be a number greater than 1: True

For 20 to be a prime number, it must be the number 2 or an odd number greater than 2: False

For 20 to be a prime number, it must only be divisible by 1 and itself: False

All of our tests above did not prove true, therefore the answer to the question: "Is 20 a prime number?" is as follows:

NO: 20 is NOT a prime number.

Using the knowledge you learned above to figure out if 20 is a prime number, do you know the answer to: Is 21 a prime number?



Enter another number below to see if it is a prime number.







 


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