PSLE Seth, Bobby and Tim had 459 stickers altogether. Seth gave
320 of his stickers to Bobby and
25 of his stickers to Tim. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Bobby and Tim at first?
|
Seth |
Bobby |
Tim |
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 Seth, Bobby and Tim in the end |
1x9 = 9 u |
1x9 = 9 u |
1x9 = 9 u |
3x9 = 27 u |
Fraction of stickers that Seth had left
= 1 -
320 -
25 = 1 -
320 -
820 =
920 Total number of stickers
= 3 x 9 u
= 27 u
27 u = 459
1 u = 459 ÷ 27 = 17
Difference in the number of stickers between Bobby and Tim at first
= 6 u - 1 u
= 5 u
= 5 x 17
= 85
Answer(s): 85