Question

I know this is a crazy question but my mind has went blank is 81 composite number? thank you medal to first and correct answer!

Answer 1

ask yourself this: does 81 have factors other than 1 and itself (81) ?

if so, then it's composite
if not, then it's prime (and not composite)

Answer 2

i'll give you a hint. 9 :P

Answer 3

If you don't get it yet, 81 is compsite because can be divided by 9.

Answer 4

yea I know is it true of false?

Answer 5

True

Answer 6

true :D ;p