Question 5
Thor wrote a 2-digit number on a piece of paper and asked Loki to guess it. Loki asked: “Is the number 72?” Thor replied: “One of the digits is correct. The position of that digit is wrong.” Loki asked again: “Is the number 42?” Thor replied: “One of the digits is correct. The position of that digit is correct.” Given two digits in the number are different, find the number written by Thor.
