PSLE Vaidev, Archie and Seth had 210 stickers altogether. Vaidev gave
110 of his stickers to Archie and
25 of his stickers to Seth. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Archie and Seth at first?
|
Vaidev |
Archie |
Seth |
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 Vaidev, Archie and Seth in the end |
1x5 = 5 u |
1x5 = 5 u |
1x5 = 5 u |
3x5 = 15 u |
Fraction of stickers that Vaidev had left
= 1 -
110 -
25 = 1 -
110 -
410 =
510 Total number of stickers
= 3 x 5 u
= 15 u
15 u = 210
1 u = 210 ÷ 15 = 14
Difference in the number of stickers between Archie and Seth at first
= 4 u - 1 u
= 3 u
= 3 x 14
= 42
Answer(s): 42