The ratio of the number of green stickers to red stickers is 3 : 1.
After Adam buys another 63 green stickers and 63 red stickers,
the ratio of the number of green stickers to red stickers is 5 : 4.
How many stickers does Adam have now?
|
Green |
Red |
Difference |
Before |
3 x 1 = 3 u |
1 x 1 = 1 u |
2 x 1 = 2 u |
Change |
+ 63 |
+ 63 |
|
After |
5 x 2 = 10 u |
4 x 2 = 8 u |
1 x 2 = 2 u |
The difference in the number of green stickers and red stickers is the same.
Make the difference in the number of green stickers and red stickers the same using the LCM of 2 and 1.
LCM of 2 and 1 = 2
Number of green stickers that Adam buys
= 10 u - 3 u
= 7 u
7 u = 63
1 u = 63 ÷ 7 = 9
Number of stickers that Adam has now
= 10 u + 8 u
= 18 u
= 18 x 9
= 162
Answer(s): 162