If '1' is subtracted from the last digit as well as the first digit and then the second and third digits are interchanged, which number will be the second if arranged in ascending order?
558,239,764,687

Options

A. 558
B. 239
C. 764
D. 687

Answer

A

Explanation

`538 to 437 to 473`
687 → 586 →568
`239 to 138 to 183`
`764 to 663 to 636`
`848 to 747 to 774`
Ascending order - 183 < 473 < 568 < 636 <774
Ans. 538