PSLE Nick, Ben and Tom had 405 stickers altogether. Nick gave
320 of his stickers to Ben and
25 of his stickers to Tom. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Ben and Tom at first?
|
Nick |
Ben |
Tom |
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 Nick, Ben and Tom in the end |
1x9 = 9 u |
1x9 = 9 u |
1x9 = 9 u |
3x9 = 27 u |
Fraction of stickers that Nick had left
= 1 -
320 -
25 = 1 -
320 -
820 =
920 Total number of stickers
= 3 x 9 u
= 27 u
27 u = 405
1 u = 405 ÷ 27 = 15
Difference in the number of stickers between Ben and Tom at first
= 6 u - 1 u
= 5 u
= 5 x 15
= 75
Answer(s): 75