Question

Juan goes to the bowling alley every three weeks Percy goes to the bowling alley every five weeks if Juan and Percy meet the first time they go bowling how many weeks will it be before they see each other at the bowling alley again

Answer 1

15 weeks because the least common multiple of 5 and 3 is 15. The multiples of 3 are 3,6,9,12,15,18,21... The multiples of 5 are 5,10,15,20,25,30,35... The first time Percy and Juan meet will be 15 weeks because it is the common multiple of both 5 and 3.

Answer 2

2 weeks because 5-3 is 2