Question
General Aptitude Question on Number Systems
The sum of the digits of a two-digit number is 10. If 18 is subtracted from it, the digits in the resulting number will be equal. The number is:
A
75
B
73
C
65
D
64
Answer
75
Explanation
Solution
Let the two-digit number be 10x + y, where x and y are the tens and unit digits respectively, and x + y = 10. If 18 is subtracted, the resulting digits become equal, implying that 10x+ y − 18 is a number with identical digits. Solving, we find that the correct answer is 75.