There are 90 stickers in Container P and 55 stickers in Container Q.
Some stickers are transferred from Container P to Container Q.
Container P has 25 more stickers than Container Q.
How many stickers are transferred from Container P to Container Q?

	Container P	Container Q
Before	90	55
Change	- ?	+ ?
After	1 u + 25	1 u

Total number of stickers
= 90 + 55
= 145

Total number of stickers in the end = 1 u + 25 + 1 u = 2 u + 25

The total number of stickers at first and in the end remains unchanged.

2 u + 25 = 145
2 u = 145 - 25 = 120

1 u = 120 ÷ 2 = 60

Number of stickers that are transferred from Container P to Container Q
= Number of stickers in Container Q in the end - Number of stickers in Container Q at first
= 60 - 55
= 5

Answer(s): 5