PSLE Ethan, Tom and Liam had 270 stickers altogether. Ethan gave
110 of his stickers to Tom and
25 of his stickers to Liam. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Tom and Liam at first?
|
Ethan |
Tom |
Liam |
Total |
Before |
10 u |
4 u |
1 u |
15 u |
Change 1 |
- 1 u |
+ 1 u |
|
|
Change 2 |
- 4 u |
|
+ 4 u |
|
After |
5 u |
5 u |
5 u |
15 u |
Comparing between Ethan, Tom and Liam in the end |
1x5 = 5 u |
1x5 = 5 u |
1x5 = 5 u |
3x5 = 15 u |
Fraction of stickers that Ethan had left
= 1 -
110 -
25 = 1 -
110 -
410 =
510 Total number of stickers
= 3 x 5 u
= 15 u
15 u = 270
1 u = 270 ÷ 15 = 18
Difference in the number of stickers between Tom and Liam at first
= 4 u - 1 u
= 3 u
= 3 x 18
= 54
Answer(s): 54