PSLE Will, Warren and Ian had 252 stickers altogether. Will gave
320 of his stickers to Warren and
14 of his stickers to Ian. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Warren and Ian at first?
|
Will |
Warren |
Ian |
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 Will, Warren and Ian in the end |
1x12 = 12 u |
1x12 = 12 u |
1x12 = 12 u |
3x12 = 36 u |
Fraction of stickers that Will had left
= 1 -
320 -
14 = 1 -
320 -
520 =
1220 Total number of stickers
= 3 x 12 u
= 36 u
36 u = 252
1 u = 252 ÷ 36 = 7
Difference in the number of stickers between Warren and Ian at first
= 9 u - 7 u
= 2 u
= 2 x 7
= 14
Answer(s): 14