There are 95 stickers in Container R and 55 stickers in Container S.
Some stickers are transferred from Container R to Container S.
Container R has 20 more stickers than Container S.
How many stickers are transferred from Container R to Container S?

	Container R	Container S
Before	95	55
Change	- ?	+ ?
After	1 u + 20	1 u

Total number of stickers
= 95 + 55
= 150

Total number of stickers in the end = 1 u + 20 + 1 u = 2 u + 20

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

2 u + 20 = 150
2 u = 150 - 20 = 130

1 u = 130 ÷ 2 = 65

Number of stickers that are transferred from Container R to Container S
= Number of stickers in Container S in the end - Number of stickers in Container S at first
= 65 - 55
= 10

Answer(s): 10