There are 80 stickers in Container M and 35 stickers in Container N.
Some stickers are transferred from Container M to Container N.
Container M has 25 more stickers than Container N.
How many stickers are transferred from Container M to Container N?

	Container M	Container N
Before	80	35
Change	- ?	+ ?
After	1 u + 25	1 u

Total number of stickers
= 80 + 35
= 115

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 = 115
2 u = 115 - 25 = 90

1 u = 90 ÷ 2 = 45

Number of stickers that are transferred from Container M to Container N
= Number of stickers in Container N in the end - Number of stickers in Container N at first
= 45 - 35
= 10

Answer(s): 10