PSLE Harry, Peter and Riordan had 324 stickers altogether. Harry gave
320 of his stickers to Peter and
25 of his stickers to Riordan. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Peter and Riordan at first?
|
Harry |
Peter |
Riordan |
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 Harry, Peter and Riordan in the end |
1x9 = 9 u |
1x9 = 9 u |
1x9 = 9 u |
3x9 = 27 u |
Fraction of stickers that Harry 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 Peter and Riordan at first
= 6 u - 1 u
= 5 u
= 5 x 12
= 60
Answer(s): 60