Three girls used the same number of buttons to make bracelets. Marion used
35 of her buttons, Betty used
25 of hers and Anna used
23 of hers. They had a total of 238 buttons at first. How many buttons did each girl use?
Make the numerators the same.
LCM of 3, 2 and 2 = 6
35 Marion's buttons =
25 Betty's buttons =
23 Anna's buttons
3x25x2 Marion's buttons =
2x35x3 Betty's buttons =
2x33x3 Anna's buttons
610 Marion's buttons =
615 Betty's buttons =
69 Anna's buttons
|
Marion |
Betty |
Anna |
Before |
10 u |
15 u |
9 u |
Change |
- 6 u |
- 6 u |
- 6 u |
After |
4 u |
9 u |
3 u |
Total number of buttons at first
= 10 u + 15 u + 9 u
= 34 u
34 u = 238
1 u = 238 ÷ 34 = 7
Number of buttons that each girl used
= 6 u
= 6 x 7
= 42
Answer(s): 42