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