Question

Ronald and Tim do their laundry today. Ronald does laundry every 6 days and Tim does his laundry every 9 days.

how many days will it be until Ronald and Tim do laundry on the same day

Answer 1

i think the answer is 3 he will 3 days left before he can wash.

Answer 2

what you bed to do is find the least common multiple of each number:

6, 12, 18, 24, 30, 36

9, 18, 27, 36

the least common multiple is 18 so every 18 days they will do laundry together