Fanny, Ivory, Tommy and Esther shared some erasers. Fanny and Ivory took
16 of the total number of erasers while Tommy and Esther took the rest. Ivory had four times as many erasers as Fanny and Esther had 72 erasers. Given that Esther had twice as many erasers as Ivory, how many erasers were there altogether?
Fanny |
Ivory |
Tommy |
Esther |
Total |
1x5 |
5x5 |
6x5 |
1 |
4 |
|
|
|
|
1x4 |
|
2x4 |
|
1 u |
4 u |
17 u |
8 u |
30 u |
Number of erasers that Ivory had is repeated. Make the number of erasers that Ivory had the same. LCM of 4 and 1 is 4.
Number of erasers that Esther had = 8 u
8 u = 72
1 u = 72 ÷ 8 = 9
Total number of erasers
= 30 u
= 30 x 9
= 270
Answer(s): 270