How does one answer this question?

Fifteen schoolgirls walk each day in five groups of three. Arrange the girls’ walk for a week so that in that time, each pair of girls walks together in a group just once.

This page is a permanent link to the reply below and its nested replies. See all post replies »

Trevo · 26-30, M

7 days is tu mutch. That's 35 groups in total. I'd try but, it's tu much.