Adam and Bryan have a total of 300 stickers.
Adam gives Bryan 50 stickers.
Now, Adam has 80 more than Bryan.
- How many stickers does Adam have at first?
- How many stickers does Bryan have in the end?
|
Adam |
Bryan |
Total |
Before |
1 u + 130 |
1 u - 50 |
300 |
Change |
- 50 |
+ 50 |
|
After |
1 u + 80 |
1 u |
2 u + 80 |
(a)
In the end
Number of stickers that Adam has = 1 u + 80
Number of stickers that Bryan has = 1 u
Total number of stickers = 1 u + 1 u + 80 = 2 u + 80
At first
Number of stickers that Adam has = 1 u + 80 + 50 = 1 u + 130
Number of stickers that Bryan has = 1 u - 50
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 + 80 = 300
2 u = 300 - 80
2 u = 220
1 u = 220 ÷ 2 = 110
Number of stickers that Adam has at first
= 1 u + 130
= 110 + 130
= 240
(b)
Number of stickers that Bryan has in the end
= 1 u
= 110
Answer(s): (a) 240; (b) 110