PSLE Zeph, Riordan and Owen had 240 stickers altogether. Zeph gave
110 of his stickers to Riordan 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 Riordan and Owen at first?
|
Zeph |
Riordan |
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 Zeph, Riordan and Owen in the end |
1x5 = 5 u |
1x5 = 5 u |
1x5 = 5 u |
3x5 = 15 u |
Fraction of stickers that Zeph had left
= 1 -
110 -
25 = 1 -
110 -
410 =
510 Total number of stickers
= 3 x 5 u
= 15 u
15 u = 240
1 u = 240 ÷ 15 = 16
Difference in the number of stickers between Riordan and Owen at first
= 4 u - 1 u
= 3 u
= 3 x 16
= 48
Answer(s): 48