There are 90 stickers in Box W and 25 stickers in Box X.
Some stickers are transferred from Box W to Box X.
Box W has 15 more stickers than Box X.
How many stickers are transferred from Box W to Box X?
|
Box W |
Box X |
Before |
90 |
25 |
Change |
- ? |
+ ? |
After |
1 u + 15 |
1 u |
Total number of stickers
= 90 + 25
= 115
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 = 115
2 u = 115 - 15 = 100
1 u = 100 ÷ 2 = 50
Number of stickers that are transferred from Box W to Box X
= Number of stickers in Box X in the end - Number of stickers in Box X at first
= 50 - 25
= 25
Answer(s): 25