PSLE Justin, Rael and Ben had 612 stickers altogether. Justin gave
320 of his stickers to Rael and
14 of his stickers to Ben. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Rael and Ben at first?
|
Justin |
Rael |
Ben |
Total |
Before |
20 u |
9 u |
7 u |
36 u |
Change 1 |
- 3 u |
+ 3 u |
|
|
Change 2 |
- 5 u |
|
+ 5 u |
|
After |
12 u |
12 u |
12 u |
36 u |
Comparing between Justin, Rael and Ben in the end |
1x12 = 12 u |
1x12 = 12 u |
1x12 = 12 u |
3x12 = 36 u |
Fraction of stickers that Justin had left
= 1 -
320 -
14 = 1 -
320 -
520 =
1220 Total number of stickers
= 3 x 12 u
= 36 u
36 u = 612
1 u = 612 ÷ 36 = 17
Difference in the number of stickers between Rael and Ben at first
= 9 u - 7 u
= 2 u
= 2 x 17
= 34
Answer(s): 34