There are 60 stickers in Box C and 40 stickers in Box D.
Some stickers are transferred from Box C to Box D.
Box D has 40 more stickers than Box C.
How many stickers are transferred from Box C to Box D?
|
Box C |
Box D |
Before |
60 |
40 |
Change |
- ? |
+ ? |
After |
1 u |
1 u + 40 |
Total number of stickers
= 60 + 40
= 100
In the end
Total number of stickers = 1 u + 1 u + 40 = 2 u + 40
The total number of stickers at first and in the end remains unchanged.
2 u + 40 = 100
2 u = 100 - 40 = 60
1 u = 60 ÷ 2 = 30
Number of stickers that are transferred from Box C to Box D
= Number of stickers in Box C at first - Number of stickers in Box C in the end
= 60 - 30
= 30
Answer(s): 30