Hotdogs come in packages of 10, while rolls come in either 8 or 12. What is the smallest number of packages of each you have to buy in order to have the same number of hotdogs and rolls?

Question

Please explain.

Answer 1

LCM(10,8) = 40
so 4 dogs, 5 8-buns
LCM(10,12) = 60
so 6 dogs, 5 12-buns