PSLE Michael, Simon and Carl had 396 stickers altogether. Michael gave
320 of his stickers to Simon and
14 of his stickers to Carl. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Simon and Carl at first?
|
Michael |
Simon |
Carl |
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 Michael, Simon and Carl in the end |
1x12 = 12 u |
1x12 = 12 u |
1x12 = 12 u |
3x12 = 36 u |
Fraction of stickers that Michael had left
= 1 -
320 -
14 = 1 -
320 -
520 =
1220 Total number of stickers
= 3 x 12 u
= 36 u
36 u = 396
1 u = 396 ÷ 36 = 11
Difference in the number of stickers between Simon and Carl at first
= 9 u - 7 u
= 2 u
= 2 x 11
= 22
Answer(s): 22