PSLE Zeph, Jenson and Ryan had 540 stickers altogether. Zeph gave
320 of his stickers to Jenson and
14 of his stickers to Ryan. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Jenson and Ryan at first?
|
Zeph |
Jenson |
Ryan |
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 Zeph, Jenson and Ryan in the end |
1x12 = 12 u |
1x12 = 12 u |
1x12 = 12 u |
3x12 = 36 u |
Fraction of stickers that Zeph had left
= 1 -
320 -
14 = 1 -
320 -
520 =
1220 Total number of stickers
= 3 x 12 u
= 36 u
36 u = 540
1 u = 540 ÷ 36 = 15
Difference in the number of stickers between Jenson and Ryan at first
= 9 u - 7 u
= 2 u
= 2 x 15
= 30
Answer(s): 30