There are 90 stickers in Container K and 45 stickers in Container L.
Some stickers are transferred from Container K to Container L.
Container K has 25 more stickers than Container L.
How many stickers are transferred from Container K to Container L?

	Container K	Container L
Before	90	45
Change	- ?	+ ?
After	1 u + 25	1 u

Total number of stickers
= 90 + 45
= 135

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 = 135
2 u = 135 - 25 = 110

1 u = 110 ÷ 2 = 55

Number of stickers that are transferred from Container K to Container L
= Number of stickers in Container L in the end - Number of stickers in Container L at first
= 55 - 45
= 10

Answer(s): 10