PSLE Warren, Simon and Sam had 210 stickers altogether. Warren gave
110 of his stickers to Simon and
25 of his stickers to Sam. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Simon and Sam at first?
|
Warren |
Simon |
Sam |
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 Warren, Simon and Sam in the end |
1x5 = 5 u |
1x5 = 5 u |
1x5 = 5 u |
3x5 = 15 u |
Fraction of stickers that Warren had left
= 1 -
110 -
25 = 1 -
110 -
410 =
510 Total number of stickers
= 3 x 5 u
= 15 u
15 u = 210
1 u = 210 ÷ 15 = 14
Difference in the number of stickers between Simon and Sam at first
= 4 u - 1 u
= 3 u
= 3 x 14
= 42
Answer(s): 42