PSLE Tommy, Sean and Pierre had 351 stickers altogether. Tommy gave
320 of his stickers to Sean 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 Sean and Pierre at first?
|
Tommy |
Sean |
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 Tommy, Sean and Pierre in the end |
1x9 = 9 u |
1x9 = 9 u |
1x9 = 9 u |
3x9 = 27 u |
Fraction of stickers that Tommy had left
= 1 -
320 -
25 = 1 -
320 -
820 =
920 Total number of stickers
= 3 x 9 u
= 27 u
27 u = 351
1 u = 351 ÷ 27 = 13
Difference in the number of stickers between Sean and Pierre at first
= 6 u - 1 u
= 5 u
= 5 x 13
= 65
Answer(s): 65