Adam has 30 blue stickers and 70 red stickers.
After giving away the same number of stickers,
the ratio of the blue stickers and the red stickers becomes 1 : 6.
How many stickers are given away?
|
Blue |
Red |
Difference |
Before |
30 |
70 |
40 |
Change |
- ? |
- ? |
|
After |
1 u |
6 u |
5 u |
At first
Difference in the number of stickers
= 70 - 30
= 40
In the end
Difference in the number of stickers in units
= 6 u - 1 u
= 5 u
The difference in the number of stickers between the blue stickers and the red stickers remains unchanged.
5 u = 40
1 u = 40 ÷ 5 = 8
Number of blue stickers that Adam gives away
= 30 - 8
= 22
Total number of stickers that Adam gives away
= 2 x 22
= 44
Answer(s): 44