Question

Kevin picked 13 more apples than andy if kevin picked up 30 apples how many did andy pick?

Answer 1

Andy picked up 17.
(30-13)

Answer 2

Simple...

you have: Kevin picked up 13 more apples than Andy and he picked up 30. So, how many did Andy pick?

30-13=17

Andy picked 17 apples.

Thus, your answer.