PSLE Tim, Luke and Luis had 378 stickers altogether. Tim gave
320 of his stickers to Luke and
25 of his stickers to Luis. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Luke and Luis at first?
|
Tim |
Luke |
Luis |
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 Tim, Luke and Luis in the end |
1x9 = 9 u |
1x9 = 9 u |
1x9 = 9 u |
3x9 = 27 u |
Fraction of stickers that Tim had left
= 1 -
320 -
25 = 1 -
320 -
820 =
920 Total number of stickers
= 3 x 9 u
= 27 u
27 u = 378
1 u = 378 ÷ 27 = 14
Difference in the number of stickers between Luke and Luis at first
= 6 u - 1 u
= 5 u
= 5 x 14
= 70
Answer(s): 70