PSLE Justin, Ben and Ivan had 240 stickers altogether. Justin gave
110 of his stickers to Ben and
25 of his stickers to Ivan. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Ben and Ivan at first?
|
Justin |
Ben |
Ivan |
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, Ben and Ivan 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 = 240
1 u = 240 ÷ 15 = 16
Difference in the number of stickers between Ben and Ivan at first
= 4 u - 1 u
= 3 u
= 3 x 16
= 48
Answer(s): 48