PSLE Oscar, Zeph and Owen had 120 stickers altogether. Oscar gave
110 of his stickers to Zeph and
25 of his stickers to Owen. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Zeph and Owen at first?
|
Oscar |
Zeph |
Owen |
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 Oscar, Zeph and Owen in the end |
1x5 = 5 u |
1x5 = 5 u |
1x5 = 5 u |
3x5 = 15 u |
Fraction of stickers that Oscar had left
= 1 -
110 -
25 = 1 -
110 -
410 =
510 Total number of stickers
= 3 x 5 u
= 15 u
15 u = 120
1 u = 120 ÷ 15 = 8
Difference in the number of stickers between Zeph and Owen at first
= 4 u - 1 u
= 3 u
= 3 x 8
= 24
Answer(s): 24