There are 90 stickers in Container J and 70 stickers in Container K.
Some stickers are transferred from Container J to Container K.
Container J has 10 more stickers than Container K.
How many stickers are transferred from Container J to Container K?

	Container J	Container K
Before	90	70
Change	- ?	+ ?
After	1 u + 10	1 u

Total number of stickers
= 90 + 70
= 160

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 = 160
2 u = 160 - 10 = 150

1 u = 150 ÷ 2 = 75

Number of stickers that are transferred from Container J to Container K
= Number of stickers in Container K in the end - Number of stickers in Container K at first
= 75 - 70
= 5

Answer(s): 5