PSLE Daniel, Glen and Sam had 360 stickers altogether. Daniel gave
320 of his stickers to Glen and
14 of his stickers to Sam. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Glen and Sam at first?
|
Daniel |
Glen |
Sam |
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 Daniel, Glen and Sam in the end |
1x12 = 12 u |
1x12 = 12 u |
1x12 = 12 u |
3x12 = 36 u |
Fraction of stickers that Daniel had left
= 1 -
320 -
14 = 1 -
320 -
520 =
1220 Total number of stickers
= 3 x 12 u
= 36 u
36 u = 360
1 u = 360 ÷ 36 = 10
Difference in the number of stickers between Glen and Sam at first
= 9 u - 7 u
= 2 u
= 2 x 10
= 20
Answer(s): 20