Mrs Hun gave Min and Ivory some money each on Tuesday. On Wednesday, Min gave
16 of the amount she had to Ivory. On Thursday, Ivory gave
13 of the amount she had to Min. In the end, Min had $18 and Ivory had $6. How much did Ivory had more than Min at first?
| |
Min |
Ivory |
Total |
| Before 1 |
6 u |
? |
$24 |
| Change 1 |
- 1 u |
+ 1 u |
|
| After 1 |
5 u |
3 p |
$24 |
| Before 2 |
$18 - 1 p |
3 p |
$24 |
| Change 2 |
+ 1 p |
- 1 p |
|
After 2 |
$18 |
2 p
($6) |
$24 |
Amount that Ivory had in the end = 2 p
2 p = 6
1 p = 6 ÷ 2 = 3
Working backwards.
Amount that Min had after giving to Ivory on Wednesday
= 18 - 1 p
= 18 - 3
= $15
5 u = 15
1 u = 15 ÷ 5 = 3
Amount that Min had at first
= 6 u
= 6 x 3
= $18
Total amount that Min and Ivory had
= 18 + 6
= $24
Amount that Ivory had at first
= 24 - 18
= $6
Amount that Min had more than Ivory
= 18 - 6
= $12
Answer(s): $12
