Cole, Perry, Elijah and Bobby bought a dishwasher for their aunt. Cole paid
13 of what the rest paid. Perry paid
15 of what the rest paid. Elijah paid
16 of what the rest paid. Bobby paid $64 more than Cole. How much did the dishwasher cost?
| Cole |
Perry |
Elijah |
Bobby |
Total |
| 1x21 |
|
|
|
4x21 |
| |
1x14 |
|
|
6x14 |
| |
|
1x12 |
|
7x12 |
| 21 u |
14 u |
12 u |
37 u |
84 u |
The cost of the dishwasher is repeated. Make the cost of the dishwasher the same. LCM of 4, 6 and 7 is 84.
Amount that Bobby had
= 84 u - (21 u + 14 u + 12 u)
= 37 u
Amount that Bobby paid more than Cole
= 37 u - 21 u
= 16 u
16 u = 64
1 u = 64 ÷ 16 = 4
Cost of the dishwasher
= 84 u
= 84 x 4
= $336
Answer(s): $336
