PSLE Billy, Mark and Wesley had 195 stickers altogether. Billy gave
110 of his stickers to Mark and
25 of his stickers to Wesley. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Mark and Wesley at first?
|
Billy |
Mark |
Wesley |
Total |
Before |
10 u |
4 u |
1 u |
15 u |
Change 1 |
- 1 u |
+ 1 u |
|
|
Change 2 |
- 4 u |
|
+ 4 u |
|
After |
5 u |
5 u |
5 u |
15 u |
Comparing between Billy, Mark and Wesley in the end |
1x5 = 5 u |
1x5 = 5 u |
1x5 = 5 u |
3x5 = 15 u |
Fraction of stickers that Billy had left
= 1 -
110 -
25 = 1 -
110 -
410 =
510 Total number of stickers
= 3 x 5 u
= 15 u
15 u = 195
1 u = 195 ÷ 15 = 13
Difference in the number of stickers between Mark and Wesley at first
= 4 u - 1 u
= 3 u
= 3 x 13
= 39
Answer(s): 39