PSLE Archie, Michael and Liam had 504 stickers altogether. Archie gave
320 of his stickers to Michael and
14 of his stickers to Liam. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Michael and Liam at first?
|
Archie |
Michael |
Liam |
Total |
Before |
20 u |
9 u |
7 u |
36 u |
Change 1 |
- 3 u |
+ 3 u |
|
|
Change 2 |
- 5 u |
|
+ 5 u |
|
After |
12 u |
12 u |
12 u |
36 u |
Comparing between Archie, Michael and Liam in the end |
1x12 = 12 u |
1x12 = 12 u |
1x12 = 12 u |
3x12 = 36 u |
Fraction of stickers that Archie had left
= 1 -
320 -
14 = 1 -
320 -
520 =
1220 Total number of stickers
= 3 x 12 u
= 36 u
36 u = 504
1 u = 504 ÷ 36 = 14
Difference in the number of stickers between Michael and Liam at first
= 9 u - 7 u
= 2 u
= 2 x 14
= 28
Answer(s): 28