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How do you find prime numbers between 70 and 80

Sagot :

To find a prime number you need to know that a prime number have 2 factors which is 1 and the number itself in other words if the answer has a decimal when divided then it's a prime number for example:

70 divided by 5 is > 14 <  no decimal then it is not prime

71 divided by 71 is  1 
and 1 divided by 71 is 1 so if every answer has the only factor which is 1 and itself then it is a prime number