Warren, Andy, Michael and Simon bought a notebook for their aunt. Warren paid
13 of what the rest paid. Andy paid
15 of what the rest paid. Michael paid
17 of what the rest paid. Simon paid $15 more than Warren. How much did the notebook cost?
Warren |
Andy |
Michael |
Simon |
Total |
1x6 |
|
|
|
4x6 |
|
1x4 |
|
|
6x4 |
|
|
1x3 |
|
8x3 |
6 u |
4 u |
3 u |
11 u |
24 u |
The cost of the notebook is repeated. Make the cost of the notebook the same. LCM of 4, 6 and 8 is 24.
Amount that Simon had
= 24 u - (6 u + 4 u + 3 u)
= 11 u
Amount that Simon paid more than Warren
= 11 u - 6 u
= 5 u
5 u = 15
1 u = 15 ÷ 5 = 3
Cost of the notebook
= 24 u
= 24 x 3
= $72
Answer(s): $72