PSLE Mark, Perry and Brandon had 135 stickers altogether. Mark gave
320 of his stickers to Perry and
25 of his stickers to Brandon. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Perry and Brandon at first?
|
Mark |
Perry |
Brandon |
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 Mark, Perry and Brandon in the end |
1x9 = 9 u |
1x9 = 9 u |
1x9 = 9 u |
3x9 = 27 u |
Fraction of stickers that Mark had left
= 1 -
320 -
25 = 1 -
320 -
820 =
920 Total number of stickers
= 3 x 9 u
= 27 u
27 u = 135
1 u = 135 ÷ 27 = 5
Difference in the number of stickers between Perry and Brandon at first
= 6 u - 1 u
= 5 u
= 5 x 5
= 25
Answer(s): 25