Jane has 3 times as many erasers as Sarah. Sarah has
45 as many erasers as Kylie. If the three of them have a total of 252 erasers, how many erasers does Kylie have?
| Jane |
Sarah |
Kylie |
| 3x4 |
1x4 |
|
| |
4x1 |
5x1 |
| 12 u |
4 u |
5 u |
The number of erasers that Sarah has is repeated. Make the number of erasers that Sarah has the same. LCM of 1 and 4 is 4.
Total number of erasers that the three of them have
= 12 u + 4 u + 5 u
= 21 u
21 u = 252
1 u = 252 ÷ 21 = 12
Number of erasers that Kylie has
= 5 u
= 5 x 12
= 60
Answer(s): 60
