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