Quantum CyberTeaser: May/June 1995


B144

Number system unknown. Find the number n such that the alphanumeric equation KYOTO + KYOTO + KYOTO = TOKYO has a solution in the base-n number system. (As usual, each letter in the equation denotes a digit in this system, and different letters denote different digits.)
[V. Dubrovsky, A. Shvetsov]

Solution