PSLE Jack, Bobby and Albert had 324 stickers altogether. Jack gave
320 of his stickers to Bobby and
25 of his stickers to Albert. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Bobby and Albert at first?
|
Jack |
Bobby |
Albert |
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 Jack, Bobby and Albert in the end |
1x9 = 9 u |
1x9 = 9 u |
1x9 = 9 u |
3x9 = 27 u |
Fraction of stickers that Jack had left
= 1 -
320 -
25 = 1 -
320 -
820 =
920 Total number of stickers
= 3 x 9 u
= 27 u
27 u = 324
1 u = 324 ÷ 27 = 12
Difference in the number of stickers between Bobby and Albert at first
= 6 u - 1 u
= 5 u
= 5 x 12
= 60
Answer(s): 60