Adam has 20 blue stickers and 80 green stickers.
After giving away the same number of stickers,
the ratio of the blue stickers and the green stickers becomes 1 : 5.
How many stickers are given away?
|
Blue |
Green |
Difference |
Before |
20 |
80 |
60 |
Change |
- ? |
- ? |
|
After |
1 u |
5 u |
4 u |
At first
Difference in the number of stickers
= 80 - 20
= 60
In the end
Difference in the number of stickers in units
= 5 u - 1 u
= 4 u
The difference in the number of stickers between the blue stickers and the green stickers remains unchanged.
4 u = 60
1 u = 60 ÷ 4 = 15
Number of blue stickers that Adam gives away
= 20 - 15
= 5
Total number of stickers that Adam gives away
= 2 x 5
= 10
Answer(s): 10