PSLE Vaidev, Riordan and Andy had 351 stickers altogether. Vaidev gave
320 of his stickers to Riordan and
25 of his stickers to Andy. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Riordan and Andy at first?
|
Vaidev |
Riordan |
Andy |
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 Vaidev, Riordan and Andy in the end |
1x9 = 9 u |
1x9 = 9 u |
1x9 = 9 u |
3x9 = 27 u |
Fraction of stickers that Vaidev had left
= 1 -
320 -
25 = 1 -
320 -
820 =
920 Total number of stickers
= 3 x 9 u
= 27 u
27 u = 351
1 u = 351 ÷ 27 = 13
Difference in the number of stickers between Riordan and Andy at first
= 6 u - 1 u
= 5 u
= 5 x 13
= 65
Answer(s): 65