PSLE Cody, Ian and Tom had 189 stickers altogether. Cody gave
320 of his stickers to Ian and
25 of his stickers to Tom. After that, all three boys had the same number of stickers. What was the difference in the number of stickers between Ian and Tom at first?
|
Cody |
Ian |
Tom |
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, Ian and Tom 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 Ian and Tom at first
= 6 u - 1 u
= 5 u
= 5 x 7
= 35
Answer(s): 35