PSLE Elijah, Caden and Billy had 504 stickers altogether. Elijah gave
320 of his stickers to Caden and
14 of his stickers to Billy. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Caden and Billy at first?
|
Elijah |
Caden |
Billy |
Total |
Before |
20 u |
9 u |
7 u |
36 u |
Change 1 |
- 3 u |
+ 3 u |
|
|
Change 2 |
- 5 u |
|
+ 5 u |
|
After |
12 u |
12 u |
12 u |
36 u |
Comparing between Elijah, Caden and Billy in the end |
1x12 = 12 u |
1x12 = 12 u |
1x12 = 12 u |
3x12 = 36 u |
Fraction of stickers that Elijah had left
= 1 -
320 -
14 = 1 -
320 -
520 =
1220 Total number of stickers
= 3 x 12 u
= 36 u
36 u = 504
1 u = 504 ÷ 36 = 14
Difference in the number of stickers between Caden and Billy at first
= 9 u - 7 u
= 2 u
= 2 x 14
= 28
Answer(s): 28