Bryan has 400 stickers.
Adam has 200 stickers.
Adam receives some stickers from Bryan.
Now, Bryan has 100 more stickers than Adam.
- How many stickers does Bryan have in the end?
- How many stickers does Adam have in the end?
- How many stickers does Bryan give to Adam?
|
Bryan |
Adam |
Total |
Before |
400 |
200 |
600 |
Change |
- ? |
+ ? |
|
After |
1 u + 100 |
1 u |
2 u + 100 |
(a)
At first
Number of stickers that Bryan has = 400
Number of stickers that Adam has = 200
Total number of stickers = 400 + 200 = 600
In the end
Number of stickers that Bryan has = 1 u + 100
Number of stickers that Adam 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 = 600
2 u = 600 - 100 = 500
1 u = 500 ÷ 2 = 250
Number of stickers that Bryan in the end
= 1 u + 100
= 250 + 100
= 350
(b)
Number of stickers that Adam has in the end
= 1 u
= 250
(c)
Number of stickers that Bryan gives to Adam
= 250 - 200
= 50
Answer(s): (a) 350; (b) 250; (c) 50