There are 100 stickers in Box T and 55 stickers in Box U.
Some stickers are transferred from Box T to Box U.
Box T has 15 more stickers than Box U.
How many stickers are transferred from Box T to Box U?
|
Box T |
Box U |
Before |
100 |
55 |
Change |
- ? |
+ ? |
After |
1 u + 15 |
1 u |
Total number of stickers
= 100 + 55
= 155
Total number of stickers in the end = 1 u + 15 + 1 u = 2 u + 15
The total number of stickers at first and in the end remains unchanged.
2 u + 15 = 155
2 u = 155 - 15 = 140
1 u = 140 ÷ 2 = 70
Number of stickers that are transferred from Box T to Box U
= Number of stickers in Box U in the end - Number of stickers in Box U at first
= 70 - 55
= 15
Answer(s): 15