Three girls used the same number of pearls to make necklaces. Gabby used
35 of her pearls, Roshel used
45 of hers and Kylie used
23 of hers. They had a total of 159 pearls at first. How many pearls did each girl use?
Make the numerators the same.
LCM of 3, 4 and 2 = 12
35 Gabby's pearls =
45 Roshel's pearls =
23 Kylie's pearls
3x45x4 Gabby's pearls =
4x35x3 Roshel's pearls =
2x63x6 Kylie's pearls
1220 Gabby's pearls =
1215 Roshel's pearls =
1218 Kylie's pearls
| |
Gabby |
Roshel |
Kylie |
| Before |
20 u |
15 u |
18 u |
| Change |
- 12 u |
- 12 u |
- 12 u |
| After |
8 u |
3 u |
6 u |
Total number of pearls at first
= 20 u + 15 u + 18 u
= 53 u
53 u = 159
1 u = 159 ÷ 53 = 3
Number of pearls that each girl used
= 12 u
= 12 x 3
= 36
Answer(s): 36
