If we divide the unknown two-digit number by the number consisting of the same digits written in the reverse order, we get 4 as quotient and 3 as remainder. If we divide the required number by sum of its digits, we get 8 as a quotient and 7 as a remainder. Find the number?
A. 81
B. 91
C. 71
D. 72
E. None of these
Answer: Option C
Bt what is the procedure