Owen has
511 as many erasers as Riordan. They have a total of 272 erasers. How many erasers must Riordan give to Owen so that they will have the same number of erasers?
|
Owen |
Riordan |
Total |
Before |
5 u |
11 u |
16 u |
Change |
+ ? |
- ? |
|
After |
136 |
136 |
272 |
Total number of erasers
= 5 u + 11 u
= 16 u
16 u = 272
1 u = 272 ÷ 16 = 17
Number of erasers that each of them has in the end
= 272 ÷ 2
= 136
Number of erasers that Owen has
= 5 u
= 5 x 17
= 85
Number of erasers that Riordan must give Owen
= 136 - 85
= 51
Answer(s): 51