PSLE Reggie, John and Charlie had 75 stickers altogether. Reggie gave
110 of his stickers to John and
25 of his stickers to Charlie. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between John and Charlie at first?
|
Reggie |
John |
Charlie |
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 Reggie, John and Charlie in the end |
1x5 = 5 u |
1x5 = 5 u |
1x5 = 5 u |
3x5 = 15 u |
Fraction of stickers that Reggie had left
= 1 -
110 -
25 = 1 -
110 -
410 =
510 Total number of stickers
= 3 x 5 u
= 15 u
15 u = 75
1 u = 75 ÷ 15 = 5
Difference in the number of stickers between John and Charlie at first
= 4 u - 1 u
= 3 u
= 3 x 5
= 15
Answer(s): 15