Riordan had $20 more than Oscar. After each of them bought an identical cardigan from a shop. Riordan was left with 5 times as much money as Oscar. Given that Riordan had $37 at first, how much did each cardigan cost?
| |
Riordan |
Oscar |
Difference |
| Before |
$37 |
|
$20 |
| Change |
- 1 cardigan |
- 1 cardigan |
|
| After |
5 u |
1 u |
4 u |
Since Riordan and Oscar each bought an identical cardigan, the difference in amount that they had at first and in the end remains the same.
4 u = 20
1 u = 20 ÷ 4 = 5
Amount that Riordan had left
= 5 u
= 5 x 5
= $25
Cost of the cardigan
= 37 - 25
= $12
Answer(s): $12
