PSLE David, Pierre and Flynn had 165 stickers altogether. David gave
110 of his stickers to Pierre and
25 of his stickers to Flynn. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Pierre and Flynn at first?
|
David |
Pierre |
Flynn |
Total |
Before |
10 u |
4 u |
1 u |
15 u |
Change 1 |
- 1 u |
+ 1 u |
|
|
Change 2 |
- 4 u |
|
+ 4 u |
|
After |
5 u |
5 u |
5 u |
15 u |
Comparing between David, Pierre and Flynn in the end |
1x5 = 5 u |
1x5 = 5 u |
1x5 = 5 u |
3x5 = 15 u |
Fraction of stickers that David had left
= 1 -
110 -
25 = 1 -
110 -
410 =
510 Total number of stickers
= 3 x 5 u
= 15 u
15 u = 165
1 u = 165 ÷ 15 = 11
Difference in the number of stickers between Pierre and Flynn at first
= 4 u - 1 u
= 3 u
= 3 x 11
= 33
Answer(s): 33