PSLE Jeremy, Ivan and Rael had 90 stickers altogether. Jeremy gave
110 of his stickers to Ivan and
25 of his stickers to Rael. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Ivan and Rael at first?
|
Jeremy |
Ivan |
Rael |
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 Jeremy, Ivan and Rael in the end |
1x5 = 5 u |
1x5 = 5 u |
1x5 = 5 u |
3x5 = 15 u |
Fraction of stickers that Jeremy had left
= 1 -
110 -
25 = 1 -
110 -
410 =
510 Total number of stickers
= 3 x 5 u
= 15 u
15 u = 90
1 u = 90 ÷ 15 = 6
Difference in the number of stickers between Ivan and Rael at first
= 4 u - 1 u
= 3 u
= 3 x 6
= 18
Answer(s): 18