There are 95 stickers in Container A and 85 stickers in Container B.
Some stickers are transferred from Container A to Container B.
Container B has 20 more stickers than Container A.
How many stickers are transferred from Container A to Container B?

	Container A	Container B
Before	95	85
Change	- ?	+ ?
After	1 u	1 u + 20

Total number of stickers
= 95 + 85
= 180

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

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

2 u + 20 = 180
2 u = 180 - 20 = 160

1 u = 160 ÷ 2 = 80

Number of stickers that are transferred from Container A to Container B
= Number of stickers in Container A at first - Number of stickers in Container A in the end
= 95 - 80
= 15

Answer(s): 15