Small grapefruits |
Medium grapefruits |
Large grapefruits |
$2 |
$4 |
$5 |
Sean had some grapefruits in 3 sizes. The number of medium grapefruits was twice the number of large grapefruits. The number of large grapefruits were four times the number of small grapefruits. He sold all the small and medium grapefruits. He received $65 from selling
14 of the large grapefruits.Sean had some grapefruits in 3 sizes.
He sold all the small and medium grapefruits. He received $65 from selling
14 of the large grapefruits.
- How many medium grapefruits did he have at first?
- How much more did he collect from selling the medium grapefruits than the small grapefruits?
Small grapefruits |
Medium grapefruits |
Large grapefruits |
|
2x4 |
1x4 |
1x1 |
|
4x1 |
1 u |
8 u |
4 u |
(a)
The number of large grapefruits is the repeated identity. Make the number of large grapefruits the same. LCM of 1 and 4 is 4.
|
Small grapefruits |
Medium grapefruits |
Large grapefruits |
Before |
1 u |
8 u |
4 u |
Change |
- 1 u |
- 8 u |
- 1 u |
After |
0 |
0 |
3 u |
Number of large grapefruits that Sean sold
=
14 x 4 u
= 1 u
|
Small grapefruits |
Medium grapefruits |
Large grapefruits |
Number |
1 u |
8 u |
1 u |
Value |
$2 |
$4 |
$5 |
Total value |
2 u |
32 u |
5 u |
Amount that Sean received from selling of
14 of the large grapefruits = 5 u
5 u = 65
1 u = 65 ÷ 5 = 13
Number of medium grapefruits at first
= 8 u
= 8 x 13
= 104
(b)
Amount that Sean collected more from selling the medium grapefruits than the small grapefruits
= 32 u - 2 u
= 30 u
= 30 x 13
= $390
Answer(s): (a) 104; (b) $390