PSLE Vincent, Billy and Justin had 135 stickers altogether. Vincent gave
110 of his stickers to Billy and
25 of his stickers to Justin. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Billy and Justin at first?
|
Vincent |
Billy |
Justin |
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 Vincent, Billy and Justin in the end |
1x5 = 5 u |
1x5 = 5 u |
1x5 = 5 u |
3x5 = 15 u |
Fraction of stickers that Vincent had left
= 1 -
110 -
25 = 1 -
110 -
410 =
510 Total number of stickers
= 3 x 5 u
= 15 u
15 u = 135
1 u = 135 ÷ 15 = 9
Difference in the number of stickers between Billy and Justin at first
= 4 u - 1 u
= 3 u
= 3 x 9
= 27
Answer(s): 27