There are 100 stickers in Box S and 60 stickers in Box T.
Some stickers are transferred from Box S to Box T.
Box S has 10 more stickers than Box T.
How many stickers are transferred from Box S to Box T?
|
Box S |
Box T |
Before |
100 |
60 |
Change |
- ? |
+ ? |
After |
1 u + 10 |
1 u |
Total number of stickers
= 100 + 60
= 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 Box S to Box T
= Number of stickers in Box T in the end - Number of stickers in Box T at first
= 75 - 60
= 15
Answer(s): 15