PSLE Jack, Xavier and Charlie had 540 stickers altogether. Jack gave
320 of his stickers to Xavier and
14 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 Xavier and Charlie at first?
|
Jack |
Xavier |
Charlie |
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 Jack, Xavier and Charlie in the end |
1x12 = 12 u |
1x12 = 12 u |
1x12 = 12 u |
3x12 = 36 u |
Fraction of stickers that Jack had left
= 1 -
320 -
14 = 1 -
320 -
520 =
1220 Total number of stickers
= 3 x 12 u
= 36 u
36 u = 540
1 u = 540 ÷ 36 = 15
Difference in the number of stickers between Xavier and Charlie at first
= 9 u - 7 u
= 2 u
= 2 x 15
= 30
Answer(s): 30