There are 80 stickers in Container K and 30 stickers in Container L.
Some stickers are transferred from Container K to Container L.
Container K has 10 more stickers than Container L.
How many stickers are transferred from Container K to Container L?

	Container K	Container L
Before	80	30
Change	- ?	+ ?
After	1 u + 10	1 u

Total number of stickers
= 80 + 30
= 110

Total number of stickers in the end = 1 u + 10 + 1 u = 2 u + 10

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

2 u + 10 = 110
2 u = 110 - 10 = 100

1 u = 100 ÷ 2 = 50

Number of stickers that are transferred from Container K to Container L
= Number of stickers in Container L in the end - Number of stickers in Container L at first
= 50 - 30
= 20

Answer(s): 20