Victoria, Fiona, Tammy and Nicole went to buy a gift for their older brother. They shared the cost equally among themselves. However, Nicole forgot to bring her money. So, the other 3 girls paid for the gift first. Tammy paid
79 of the amount Victoria and Fiona paid. Fiona paid $4 more than Victoria. The next day, Nicole returned $30 to Tammy and some money to Victoria and Fiona. How much did Nicole return to
- Victoria?
- Fiona?
|
Victoria |
Fiona |
Tammy |
Nicole |
Total |
Comparing the amounts 3 girls paid first |
9 u
|
7 u
|
|
16 u
|
Comparing the amounts 2 girls paid first |
1 p
|
1 p + 4
|
|
|
|
Amounts that each girl paid for Nicole first |
- ? |
- ? |
- 30
|
+ 30 + ? |
|
Comparing the amounts each girl should pay |
1x4 = 4 u |
1x4 = 4 u |
1x4 = 4 u |
1x4 = 4 u |
4x4 = 16 u |
(a)
The total amount that the 4 girls paid is repeated. Make the total amount the same. LCM of 4 and 16 is 16.
Extra amount that Tammy paid
= 7 u - 4 u
= 3 u
3 u = 30
1 u = 30 ÷ 3 = 10
Total amount that Victoria and Fiona paid at first
= 9 u
= 9 x 10
= $90
1 p + 1 p + 4 = 90
2 p = 90 - 4
2 p = 86
1 p = 86 ÷ 2 = 43
Amount that Nicole needed to pay Victoria
= 1 p - 4 u
= 43 - 4 x 10
= 43 - 40
= $3
(b)
Amount that Nicole needed to pay Fiona
= (1 p + 4) - 4 u
= (43 + 4) - 4 x 10
= 47 - 40
= $7
Answer(s): (a) $3; (b) $7