PSLE Fabian, Ken and Albert had 486 stickers altogether. Fabian gave
320 of his stickers to Ken 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 Ken and Albert at first?
|
Fabian |
Ken |
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 Fabian, Ken and Albert in the end |
1x9 = 9 u |
1x9 = 9 u |
1x9 = 9 u |
3x9 = 27 u |
Fraction of stickers that Fabian had left
= 1 -
320 -
25 = 1 -
320 -
820 =
920 Total number of stickers
= 3 x 9 u
= 27 u
27 u = 486
1 u = 486 ÷ 27 = 18
Difference in the number of stickers between Ken and Albert at first
= 6 u - 1 u
= 5 u
= 5 x 18
= 90
Answer(s): 90