Question

Jim cuts the grass every 7 days and works in the garden every 3 days. if he cut the grass and worked on the garden on June 1st, when is the next day that he will do both of these activities?

Answer 1

June 22nd is the answer to your question

Answer 2

find the least common multiplule
since they are both prime, just multiply them
3*7=21

on June 21 is when he does both