A Logician has 4 students. He decides to test them. He writes a number on a piece of paper and folds it. He says: “Listen. I have written a 2 digit positive integer on this paper and Raj, Ken and Amy will get to see it. Those three are allowed one correct written statement about the number without actually disclosing the number. Your written statement - which could be a clue - will allow Lisa to guess the number. Do not make it easy on her. You must be truthful.” Raj looks at the number, ...
