Abi, Jane, George and Opal shared some erasers. Abi and Jane took
13 of the total number of erasers while George and Opal took the rest. Jane had thrice as many erasers as Abi and Opal had 36 erasers. Given that Opal had twice as many erasers as Jane, how many erasers were there altogether?
Abi |
Jane |
George |
Opal |
Total |
1x4 |
2x4 |
3x4 |
1 |
3 |
|
|
|
|
1x3 |
|
2x3 |
|
1 u |
3 u |
2 u |
6 u |
12 u |
Number of erasers that Jane had is repeated. Make the number of erasers that Jane had the same. LCM of 3 and 1 is 3.
Number of erasers that Opal had = 6 u
6 u = 36
1 u = 36 ÷ 6 = 6
Total number of erasers
= 12 u
= 12 x 6
= 72
Answer(s): 72