Mrs Ee gave Mary and Julie some money each on Monday. On Tuesday, Mary gave
14 of the amount she had to Julie. On Wednesday, Julie gave
13 of the amount she had to Mary. In the end, Mary had $27 and Julie had $12. How much did Julie had more than Mary at first?
| |
Mary |
Julie |
Total |
| Before 1 |
4 u |
? |
$39 |
| Change 1 |
- 1 u |
+ 1 u |
|
| After 1 |
3 u |
3 p |
$39 |
| Before 2 |
$27 - 1 p |
3 p |
$39 |
| Change 2 |
+ 1 p |
- 1 p |
|
After 2 |
$27 |
2 p
($12) |
$39 |
Amount that Julie had in the end = 2 p
2 p = 12
1 p = 12 ÷ 2 = 6
Working backwards.
Amount that Mary had after giving to Julie on Tuesday
= 27 - 1 p
= 27 - 6
= $21
3 u = 21
1 u = 21 ÷ 3 = 7
Amount that Mary had at first
= 4 u
= 4 x 7
= $28
Total amount that Mary and Julie had
= 27 + 12
= $39
Amount that Julie had at first
= 39 - 28
= $11
Amount that Mary had more than Julie
= 28 - 11
= $17
Answer(s): $17
