PSLE Archie, Oscar and Peter had 324 stickers altogether. Archie gave
320 of his stickers to Oscar and
25 of his stickers to Peter. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Oscar and Peter at first?
|
Archie |
Oscar |
Peter |
Total |
Before |
20 u |
6 u |
1 u |
27 u |
Change 1 |
- 3 u |
+ 3 u |
|
|
Change 2 |
- 8 u |
|
+ 8 u |
|
After |
9 u |
9 u |
9 u |
27 u |
Comparing between Archie, Oscar and Peter in the end |
1x9 = 9 u |
1x9 = 9 u |
1x9 = 9 u |
3x9 = 27 u |
Fraction of stickers that Archie had left
= 1 -
320 -
25 = 1 -
320 -
820 =
920 Total number of stickers
= 3 x 9 u
= 27 u
27 u = 324
1 u = 324 ÷ 27 = 12
Difference in the number of stickers between Oscar and Peter at first
= 6 u - 1 u
= 5 u
= 5 x 12
= 60
Answer(s): 60