PSLE Ian, Bobby and Pierre had 297 stickers altogether. Ian gave
320 of his stickers to Bobby and
25 of his stickers to Pierre. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Bobby and Pierre at first?
|
Ian |
Bobby |
Pierre |
Total |
Before |
20 u |
6 u |
1 u |
27 u |
Change 1 |
- 3 u |
+ 3 u |
|
|
Change 2 |
- 8 u |
|
+ 8 u |
|
After |
9 u |
9 u |
9 u |
27 u |
Comparing between Ian, Bobby and Pierre in the end |
1x9 = 9 u |
1x9 = 9 u |
1x9 = 9 u |
3x9 = 27 u |
Fraction of stickers that Ian had left
= 1 -
320 -
25 = 1 -
320 -
820 =
920 Total number of stickers
= 3 x 9 u
= 27 u
27 u = 297
1 u = 297 ÷ 27 = 11
Difference in the number of stickers between Bobby and Pierre at first
= 6 u - 1 u
= 5 u
= 5 x 11
= 55
Answer(s): 55