Question

Gary the snowman is making cookies. He wants to put 3 chocolate chip cookies and 7 sugar doodle cookies in each box. What is the least amount of boxes Gary can put together without having any cookies left over?

Answer 1

21 boxes

Step-by-step explanation:

To obtain the least amount of boxes Gary can put together ;

Obtain the lowest common multiple of 3 and 7

Multiples of :

3 = 3, 6, 9, 12, 15, 18, 21, 24, 27, 30,..

7 = 7, 14, 21, 28, 35, 42,...

Hence, the lowest common multiple of 3 and 7 is 21.

The least number of boxes Gary cab put together without having any cookies leftover is 21.