PSLE Harry, Carl and Tommy had 684 stickers altogether. Harry gave
320 of his stickers to Carl and
14 of his stickers to Tommy. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Carl and Tommy at first?
|
Harry |
Carl |
Tommy |
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 Harry, Carl and Tommy in the end |
1x12 = 12 u |
1x12 = 12 u |
1x12 = 12 u |
3x12 = 36 u |
Fraction of stickers that Harry had left
= 1 -
320 -
14 = 1 -
320 -
520 =
1220 Total number of stickers
= 3 x 12 u
= 36 u
36 u = 684
1 u = 684 ÷ 36 = 19
Difference in the number of stickers between Carl and Tommy at first
= 9 u - 7 u
= 2 u
= 2 x 19
= 38
Answer(s): 38