Question

Katie wants to lock her bike in the bike rack near the school and there are 7 spots still open. She arrives at the same time as 3 other students. How many ways can the 4 children rearrange their bikes in the 7 open spots?

Answer 1

28 different ways :)

Explanation:

4x7=28

Katie, Friend 1, Friend 2, Friend 3, space, space, space

space, Katie, Friend 1, Friend 2, Friend 3, space, space

space, space, Katie, Friend 1, Friend 2, Friend 3, space

space, space, space, Katie, Friend 1, Friend 2, Friend 3

Katie, space, Friend 1, space, Friend 2, space, Friend 3

Friend 1, space, Friend 2, space, Friend 3, space, Katie

etc.

Hope that helped :)