PSLE Charlie, Ben and Michael had 189 stickers altogether. Charlie gave
320 of his stickers to Ben and
25 of his stickers to Michael. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Ben and Michael at first?
|
Charlie |
Ben |
Michael |
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 Charlie, Ben and Michael in the end |
1x9 = 9 u |
1x9 = 9 u |
1x9 = 9 u |
3x9 = 27 u |
Fraction of stickers that Charlie had left
= 1 -
320 -
25 = 1 -
320 -
820 =
920 Total number of stickers
= 3 x 9 u
= 27 u
27 u = 189
1 u = 189 ÷ 27 = 7
Difference in the number of stickers between Ben and Michael at first
= 6 u - 1 u
= 5 u
= 5 x 7
= 35
Answer(s): 35