PSLE Jack, Archie and Lee had 396 stickers altogether. Jack gave
320 of his stickers to Archie and
14 of his stickers to Lee. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Archie and Lee at first?
|
Jack |
Archie |
Lee |
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, Archie and Lee 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 = 396
1 u = 396 ÷ 36 = 11
Difference in the number of stickers between Archie and Lee at first
= 9 u - 7 u
= 2 u
= 2 x 11
= 22
Answer(s): 22