Cody and Vaidev had 75 files. After Cody gave 25 files to Vaidev. Vaidev, in return, gave half of his files to Cody. In the end, Cody had twice as many files as Vaidev. How many files did Cody have at first?
| |
Cody |
Vaidev |
Total |
| Before |
1 u + 25 |
2 u - 25 |
75 |
| Change 1 |
- 25 |
+ 25 |
|
| After 1 |
1 u |
2 u |
|
| Change 2 |
+ 1 u |
- 1 u |
|
| After 2 |
2 u |
1 u |
75 |
Total number of files that Cody and Vaidev had at first and in the end remains unchanged.
Total number of files
= 2 u + 1 u
= 3 u
1 u = 75 ÷ 3 = 25
Number of files that Cody had at first
= 1 u + 25
= 25 + 25
= 50
Answer(s): 50
