Asked by Sis

If U={natural numbers less than 20} and N={factors of 18}, what is N’?

What am I supposed to do?

I know the factors of 18 are 1, 2,3,6, 9, & 18.
I know the natural numbers less than 20 are 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20. So what am I supposed to be looking for?

Thank you!

Answers

Answered by Reiny
N' is the notation for "N compliment"
or "not N"
so in your list for U, which numbers are NOT factors of 18 ?
Answered by syai mcfee
natural number that are less than 18
Answered by syai mcfee
even number are
Answered by Imelda
Thanks

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