There are 70 stickers in Container N and 40 stickers in Container P.
Some stickers are transferred from Container N to Container P.
Container N has 20 more stickers than Container P.
How many stickers are transferred from Container N to Container P?

	Container N	Container P
Before	70	40
Change	- ?	+ ?
After	1 u + 20	1 u

Total number of stickers
= 70 + 40
= 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 N to Container P
= Number of stickers in Container P in the end - Number of stickers in Container P at first
= 45 - 40
= 5

Answer(s): 5