PSLE Eric, Andy and Pierre had 75 stickers altogether. Eric gave
110 of his stickers to Andy and
25 of his stickers to Pierre. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Andy and Pierre at first?
|
Eric |
Andy |
Pierre |
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 Eric, Andy and Pierre in the end |
1x5 = 5 u |
1x5 = 5 u |
1x5 = 5 u |
3x5 = 15 u |
Fraction of stickers that Eric had left
= 1 -
110 -
25 = 1 -
110 -
410 =
510 Total number of stickers
= 3 x 5 u
= 15 u
15 u = 75
1 u = 75 ÷ 15 = 5
Difference in the number of stickers between Andy and Pierre at first
= 4 u - 1 u
= 3 u
= 3 x 5
= 15
Answer(s): 15