PSLE Andy, Caden and Oscar had 189 stickers altogether. Andy gave
320 of his stickers to Caden and
25 of his stickers to Oscar. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Caden and Oscar at first?
|
Andy |
Caden |
Oscar |
Total |
Before |
20 u |
6 u |
1 u |
27 u |
Change 1 |
- 3 u |
+ 3 u |
|
|
Change 2 |
- 8 u |
|
+ 8 u |
|
After |
9 u |
9 u |
9 u |
27 u |
Comparing between Andy, Caden and Oscar in the end |
1x9 = 9 u |
1x9 = 9 u |
1x9 = 9 u |
3x9 = 27 u |
Fraction of stickers that Andy had left
= 1 -
320 -
25 = 1 -
320 -
820 =
920 Total number of stickers
= 3 x 9 u
= 27 u
27 u = 189
1 u = 189 ÷ 27 = 7
Difference in the number of stickers between Caden and Oscar at first
= 6 u - 1 u
= 5 u
= 5 x 7
= 35
Answer(s): 35