PSLE Michael, Paul and Owen had 180 stickers altogether. Michael gave
320 of his stickers to Paul and
14 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 Paul and Owen at first?
|
Michael |
Paul |
Owen |
Total |
Before |
20 u |
9 u |
7 u |
36 u |
Change 1 |
- 3 u |
+ 3 u |
|
|
Change 2 |
- 5 u |
|
+ 5 u |
|
After |
12 u |
12 u |
12 u |
36 u |
Comparing between Michael, Paul and Owen in the end |
1x12 = 12 u |
1x12 = 12 u |
1x12 = 12 u |
3x12 = 36 u |
Fraction of stickers that Michael had left
= 1 -
320 -
14 = 1 -
320 -
520 =
1220 Total number of stickers
= 3 x 12 u
= 36 u
36 u = 180
1 u = 180 ÷ 36 = 5
Difference in the number of stickers between Paul and Owen at first
= 9 u - 7 u
= 2 u
= 2 x 5
= 10
Answer(s): 10