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