Adam has 800 stickers.
Bryan has 400 stickers.
Bryan receives some stickers from Adam.
Now, Adam has 100 more stickers than Bryan.
- How many stickers does Adam have in the end?
- How many stickers does Bryan have in the end?
- How many stickers does Adam give to Bryan?
|
Adam |
Bryan |
Total |
Before |
800 |
400 |
1200 |
Change |
- ? |
+ ? |
|
After |
1 u + 100 |
1 u |
2 u + 100 |
(a)
At first
Number of stickers that Adam has = 800
Number of stickers that Bryan has = 400
Total number of stickers = 800 + 400 = 1200
In the end
Number of stickers that Adam has = 1 u + 100
Number of stickers that Bryan has = 1 u
Total number of stickers
= 1 u + 1 u + 100
= 2 u + 100
The total number of stickers at first and in the end remains unchanged.
Total number of stickers in the end = Total number of stickers at first
2 u + 100 = 1200
2 u = 1200 - 100 = 1100
1 u = 1100 ÷ 2 = 550
Number of stickers that Adam in the end
= 1 u + 100
= 550 + 100
= 650
(b)
Number of stickers that Bryan has in the end
= 1 u
= 550
(c)
Number of stickers that Adam gives to Bryan
= 550 - 400
= 150
Answer(s): (a) 650; (b) 550; (c) 150