PSLE Albert, Bobby and Ahmad had 285 stickers altogether. Albert gave
110 of his stickers to Bobby and
25 of his stickers to Ahmad. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Bobby and Ahmad at first?
|
Albert |
Bobby |
Ahmad |
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 Albert, Bobby and Ahmad in the end |
1x5 = 5 u |
1x5 = 5 u |
1x5 = 5 u |
3x5 = 15 u |
Fraction of stickers that Albert had left
= 1 -
110 -
25 = 1 -
110 -
410 =
510 Total number of stickers
= 3 x 5 u
= 15 u
15 u = 285
1 u = 285 ÷ 15 = 19
Difference in the number of stickers between Bobby and Ahmad at first
= 4 u - 1 u
= 3 u
= 3 x 19
= 57
Answer(s): 57