PSLE Ryan, Ben and Cole had 486 stickers altogether. Ryan gave
320 of his stickers to Ben and
25 of his stickers to Cole. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Ben and Cole at first?
|
Ryan |
Ben |
Cole |
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 Ryan, Ben and Cole in the end |
1x9 = 9 u |
1x9 = 9 u |
1x9 = 9 u |
3x9 = 27 u |
Fraction of stickers that Ryan 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 Ben and Cole at first
= 6 u - 1 u
= 5 u
= 5 x 18
= 90
Answer(s): 90