Cindy had 102 more stickers than Risa. After Risa gave away
35 of her stickers, Cindy had four times as many stickers as Risa. How many stickers did Risa have at first?
| |
Cindy |
Risa |
Comparing Cindy
and Risa at first |
102 more |
|
| Before |
8 u |
5 u |
| Change |
|
- 3 u |
| After |
|
2 u |
Comparing Cindy
and Risa in the end |
4x2 =
8 u |
1x2 =
2 u |
The number of stickers that Cindy had at first and in the end remains unchanged. Make the number of stickers that Cindy had the same. LCM of 8 and 4 is 8.
Number of stickers that Cindy had more than Risa at first
= 8 u - 5 u
= 3 u
3 u = 102
1 u = 102 ÷ 3 = 34
Number of stickers that Risa had at first
= 5 u
= 5 x 34
= 170
Answer(s): 170
