The ratio of the number of red stickers to blue stickers is 2 : 1.
After Adam gives away another 20 red stickers and 20 blue stickers,
the ratio of the number of red stickers to blue stickers is 8 : 3.
How many stickers does Adam have now?
|
Red |
Blue |
Difference |
Before |
2 x 5 = 10 u |
1 x 5 = 5 u |
1 x 5 = 5 u |
Change |
- 20 |
- 20 |
|
After |
8 x 1 = 8 u |
3 x 1 = 3 u |
5 x 1 = 5 u |
The difference in the number of red stickers and blue stickers is the same.
Make the difference in the number of red stickers and blue stickers the same using the LCM of 1 and 5.
LCM of 1 and 5 = 5
Number of red stickers that Adam gives away
= 10 u - 8 u
= 2 u
2 u = 20
1 u = 20 ÷ 2 = 10
Number of stickers that Adam has now
= 8 u + 3 u
= 11 u
= 11 x 10
= 110
Answer(s): 110