What is the smallest positive integer that is the sum of a multiple of 15 and a multiple of 21? (Remember that multiples can be negative.)

qwertyuiopasdfghjkl Apr 6, 2020

#4**+1 **

Ok, i fixed the question. If anyone could figure this out, that would be great!

qwertyuiopasdfghjkl Apr 6, 2020

#7**+2 **

I get 6

(-15) is a multiple of 15

(21) is a multiple of 21

So

-15 + 21 =

6

Anyone have a different (better) answer ???

CPhill Apr 6, 2020

#10

#16**+2 **

That doesn't work becuase the question asks for "What is the smallest positive integer..." and 0 is not positive.

Hope it helps!

HELPMEEEEEEEEEEEEE
Apr 6, 2020