The ratio of the number of blue stickers to red stickers is 5 : 3.
After Adam gives away another 99 blue stickers and 99 red stickers,
the ratio of the number of blue stickers to red stickers is 7 : 3.
How many stickers does Adam have now?
|
Blue |
Red |
Difference |
Before |
5 x 2 = 10 u |
3 x 2 = 6 u |
2 x 2 = 4 u |
Change |
- 99 |
- 99 |
|
After |
7 x 1 = 7 u |
3 x 1 = 3 u |
4 x 1 = 4 u |
The difference in the number of blue stickers and red stickers is the same.
Make the difference in the number of blue stickers and red stickers the same using the LCM of 2 and 4.
LCM of 2 and 4 = 4
Number of blue stickers that Adam gives away
= 10 u - 7 u
= 3 u
3 u = 99
1 u = 99 ÷ 3 = 33
Number of stickers that Adam has now
= 7 u + 3 u
= 10 u
= 10 x 33
= 330
Answer(s): 330