Question

Bethany wears jeans every 2 day. She wears running shoes every 3 days. If she wears jeans and running shoes on may 1st what are the next three dates she will wear both jeans and running shoes

Answer 1

You would find the multiples 2 and 3 had in common
so may 6th, 12th, and 18th
2:   3:
4    6*
6*   9
8    12*
10   15
12*  18*
14
16
18*