Question

A class of 9 kindergarten children is to be taken for a walk each afternoon. The teacher decides that they will walk in sets of 3, and any pair of children will walk together on one day only. For how many days can this system be maintained?

a)1
b)2
c)3
d)4
e)5

Answer 1

Answer will c)3

Answer 2

because each new pair will form, so it will takes 3 days for making 3 different pairs daily.