PSLE Vaidev, Ahmad and Jeremy had 120 stickers altogether. Vaidev gave
110 of his stickers to Ahmad and
25 of his stickers to Jeremy. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Ahmad and Jeremy at first?
|
Vaidev |
Ahmad |
Jeremy |
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, Ahmad and Jeremy 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 = 120
1 u = 120 ÷ 15 = 8
Difference in the number of stickers between Ahmad and Jeremy at first
= 4 u - 1 u
= 3 u
= 3 x 8
= 24
Answer(s): 24