Risa has 2 times as many erasers as Fiona. Fiona has
35 as many erasers as Cindy. If the three of them have a total of 154 erasers, how many erasers does Cindy have?
| Risa |
Fiona |
Cindy |
| 2x3 |
1x3 |
|
| |
3x1 |
5x1 |
| 6 u |
3 u |
5 u |
The number of erasers that Fiona has is repeated. Make the number of erasers that Fiona has the same. LCM of 1 and 3 is 3.
Total number of erasers that the three of them have
= 6 u + 3 u + 5 u
= 14 u
14 u = 154
1 u = 154 ÷ 14 = 11
Number of erasers that Cindy has
= 5 u
= 5 x 11
= 55
Answer(s): 55
