There are 90 stickers in Box U and 70 stickers in Box V.
Some stickers are transferred from Box U to Box V.
Box V has 30 more stickers than Box U.
How many stickers are transferred from Box U to Box V?
|
Box U |
Box V |
Before |
90 |
70 |
Change |
- ? |
+ ? |
After |
1 u |
1 u + 30 |
Total number of stickers
= 90 + 70
= 160
In the end
Total number of stickers = 1 u + 1 u + 30 = 2 u + 30
The total number of stickers at first and in the end remains unchanged.
2 u + 30 = 160
2 u = 160 - 30 = 130
1 u = 130 ÷ 2 = 65
Number of stickers that are transferred from Box U to Box V
= Number of stickers in Box U at first - Number of stickers in Box U in the end
= 90 - 65
= 25
Answer(s): 25