There are 90 stickers in Box N and 15 stickers in Box P.
Some stickers are transferred from Box N to Box P.
Box N has 15 more stickers than Box P.
How many stickers are transferred from Box N to Box P?
|
Box N |
Box P |
Before |
90 |
15 |
Change |
- ? |
+ ? |
After |
1 u + 15 |
1 u |
Total number of stickers
= 90 + 15
= 105
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 = 105
2 u = 105 - 15 = 90
1 u = 90 ÷ 2 = 45
Number of stickers that are transferred from Box N to Box P
= Number of stickers in Box P in the end - Number of stickers in Box P at first
= 45 - 15
= 30
Answer(s): 30