Is 68 prime because i am doing homework and im stuck on this and it is very hard so help me please

2 answers:

8 0

If 68 is a prime number, then the only factors it has are 1 and 68.
If it has any other factors besides 1 and 68, then it's NOT prime.

Right away, without any higher math, you can look at just the last digit
in 68 . The last digit is '8'. That tells you that '68' is an even number,
and THAT tells you that '2' must be one of its factors. So '68' is not a
prime number.

The factors of 68 are 1, 2, 4, 17, 34, and 68 .

68 has four more factors besides 1 and 68, so it's not a prime number.

Diano4ka-milaya [45]2 years ago

8 0

No, it's not. 68 can be divided by 2

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