PSLE Cody, Liam and Sam had 189 stickers altogether. Cody gave
320 of his stickers to Liam and
25 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 Liam and Sam at first?
|
Cody |
Liam |
Sam |
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 Cody, Liam and Sam in the end |
1x9 = 9 u |
1x9 = 9 u |
1x9 = 9 u |
3x9 = 27 u |
Fraction of stickers that Cody had left
= 1 -
320 -
25 = 1 -
320 -
820 =
920 Total number of stickers
= 3 x 9 u
= 27 u
27 u = 189
1 u = 189 ÷ 27 = 7
Difference in the number of stickers between Liam and Sam at first
= 6 u - 1 u
= 5 u
= 5 x 7
= 35
Answer(s): 35