Question

A,B,C are three consecutive odd numbers. If ABC= 531117,find A+B+C.

Answer 1

Let the numbers be B-2, B and B+2
$\Rightarrow (B-2)\times B\times (B+2)=531117=79\times 83\times 3^4=79\times 81\times 83$.
Hence, B = 81.
$\Rightarrow$ A + B + C = 79 + 81 + 83 = 243.