Three girls used the same number of seashells to make necklaces. Yoko used
35 of her seashells, Shiyun used
25 of hers and Shannon used
23 of hers. They had a total of 102 seashells at first. How many seashells did each girl use?
Make the numerators the same.
LCM of 3, 2 and 2 = 6
35 Yoko's seashells =
25 Shiyun's seashells =
23 Shannon's seashells
3x25x2 Yoko's seashells =
2x35x3 Shiyun's seashells =
2x33x3 Shannon's seashells
610 Yoko's seashells =
615 Shiyun's seashells =
69 Shannon's seashells
|
Yoko |
Shiyun |
Shannon |
Before |
10 u |
15 u |
9 u |
Change |
- 6 u |
- 6 u |
- 6 u |
After |
4 u |
9 u |
3 u |
Total number of seashells at first
= 10 u + 15 u + 9 u
= 34 u
34 u = 102
1 u = 102 ÷ 34 = 3
Number of seashells that each girl used
= 6 u
= 6 x 3
= 18
Answer(s): 18