CSATNumber System & SeriesDigits Arithmetic2017

There are certain 2-digit numbers. The difference between the number and the one obtained on reversing it is always 27. How many such maximum 2-digit numbers are there?

A

3

B

4

C

5

D

None of the above

Correct Answer: Option D

Explanation

1. Recall the standard property discussed in number system analysis: The difference between a 2-digit number and its reverse is always divisible by 9 [8]. 2. Specifically, the di

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