# math

Can a whole number ending in 8 be prime?

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asked by deb
1. See what you think.

http://mathforum.org/dr.math/faq/faq.prime.num.html

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2. No, any whole number ending in 8 will never be prime. A number ending in 8 will always be divisible by 2. The rule for 2 is:
If any number ends in any even number (0, 2, 4, 6, or 8) it will always be divisible by 2 and therefore it is not prime.
There are other rules such as this one that really help when you want to find out whether or not a whole number is prime or not. I've used them ever since I learned them. Hope this helps!

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posted by Chloe
3. GvTvVhrtvtv

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posted by Ayaan

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