Darrell was given 1/4 of the stickers to decorate his folder.

Question

 Darryl was given 1/4 of the stickers to decorate his folder. If he received 8 stickers, how many were in the whole pack? 

Answer 1

In order to find the answer, you must do the opposite of what has happened. 1/4 implies that the pack of stickers was divided by 4 to give Darrell 8 stickers.  So what is the opposite of division?