Question

Did you hear about the mathematician who wanted to make a fruit salad,s so he bought some apples and oranges answers

Answer 1

Did you hear about the mathematician who wanted to make a fruit salad,s so he bought some apples and oranges and ordered pears.
Ordered pears under this context is a pun for ordered pairs, which explains that the objects appear in the pair is significant: the ordered pair (a, b)definitely different than (b, a) unless a = b.