PSLE Mark, Brandon and Lee had 459 stickers altogether. Mark gave
320 of his stickers to Brandon and
25 of his stickers to Lee. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Brandon and Lee at first?
|
Mark |
Brandon |
Lee |
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, Brandon and Lee 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 = 459
1 u = 459 ÷ 27 = 17
Difference in the number of stickers between Brandon and Lee at first
= 6 u - 1 u
= 5 u
= 5 x 17
= 85
Answer(s): 85