Question

A number consists of 3 digits whose sum is 10. The middle digit is equal to the sum of the other two and the number will be increased by 99 if its digits are reversed. The number is:

• A. 145
• B. 253
• C. 370
• D. 352

Answer 1

Answer: (B)

253

Let the middle digit be $x$
Then $2x=10$ or $x=5$ So, the number is either $253$ or $352$ and another pair is $154$ or $451$
Since the number increases on reversing the digits, so the hundred's digits is smaller than the units digit
Hence, required number is $253$ because$154$ and$451$ difference is not $99$