If the five-digit number 570xy is divisible by 231, then what is the value of (2x - y)?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 3.
The biggest possible term in terms of 570xy is 57099
57099 ÷ 231 = 247.18
By taking the integer part: 231 × 247 = 57057
So, x = 5, y = 7
Now, (2x - y) = 2 × 5 - 7 = 10 - 7 = 3