SOLUTION: Which of the following numbers is divisible by 2 and 3 and 6, but not by 18? a.48 b.36 c.18 d.54 e.72

Algebra ->  Problems-with-consecutive-odd-even-integers -> SOLUTION: Which of the following numbers is divisible by 2 and 3 and 6, but not by 18? a.48 b.36 c.18 d.54 e.72      Log On


   

Question 907701: Which of the following numbers is divisible by 2 and 3 and 6, but not by 18?
a.48
b.36
c.18
d.54
e.72
Answer by Edwin McCravy(20056) About Me  (Show Source):
You can put this solution on YOUR website!
Since 18 = 2*3*3, then for an integer not to be divisible by 18,
yet divisible by 2 and 3 (and therefore 6), it must be even and
not be divisible by 3*3 or 9.  They're all even, but the only 
one in the list that isn't divisible by 9 is a. 48.

Edwin