Three girls gave an equal amount of money to buy a present for David. Gem used
13 of her money. Hazel used
35 of her money and Gillian used
23 of hers. They had a total of $185 at first. How much was the present?
| |
Gem |
Hazel |
Gillian |
Total |
| Before |
3x6 =
18 u |
5x2 =
10 u |
3x3 =
9 u |
37 u ($185) |
| Change |
- 1x6 =
- 6 u |
- 3x2 =
- 6 u |
- 2x3 =
- 6 u |
- 18 u |
| After |
2x6 =
12 u |
2x2 =
4 u |
1x3 =
3 u |
19 u |
The three girls gave equal amount of money to buy the present. Make the amount that each spent the same. LCM of 1, 3 and 2 is 6.
Total amount that three girls had at first
= 18 u + 10 u + 9 u
= 37 u
37 u = 185
1 u = 185 ÷ 37 = 5
Cost of the present
= 3 x 6 u
= 18 u
= 18 x 5
= $90
Answer(s): $90
