There are 90 stickers in Container G and 20 stickers in Container H.
Some stickers are transferred from Container G to Container H.
Container G has 20 more stickers than Container H.
How many stickers are transferred from Container G to Container H?

	Container G	Container H
Before	90	20
Change	- ?	+ ?
After	1 u + 20	1 u

Total number of stickers
= 90 + 20
= 110

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 = 110
2 u = 110 - 20 = 90

1 u = 90 ÷ 2 = 45

Number of stickers that are transferred from Container G to Container H
= Number of stickers in Container H in the end - Number of stickers in Container H at first
= 45 - 20
= 25

Answer(s): 25