PSLE Sean, Ahmad and Harry had 75 stickers altogether. Sean gave
110 of his stickers to Ahmad and
25 of his stickers to Harry. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Ahmad and Harry at first?
|
Sean |
Ahmad |
Harry |
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 Sean, Ahmad and Harry in the end |
1x5 = 5 u |
1x5 = 5 u |
1x5 = 5 u |
3x5 = 15 u |
Fraction of stickers that Sean had left
= 1 -
110 -
25 = 1 -
110 -
410 =
510 Total number of stickers
= 3 x 5 u
= 15 u
15 u = 75
1 u = 75 ÷ 15 = 5
Difference in the number of stickers between Ahmad and Harry at first
= 4 u - 1 u
= 3 u
= 3 x 5
= 15
Answer(s): 15