Correct Answer: Option D
Then, number = 10x + y.
Number obtained by interchanging the digits = 10y + x.
Now, adding both number we get,
(10x + y) + (10y + x)
= 11x + 11y
= 11(x + y),
Which is divisible by 11.
Download our app for free and access thousands of MCQ questions with detailed solutions