There are 69 people in a room, of which 42 are truth-tellers (they always tell the truth) and the rest are liars (they can lie *or* tell the truth).

You are allowed to ask any person A whether any person B (other than person A) is a liar or not. What is the minimum number of questions needed to ensure that you can correctly identify at least one truth-teller?

×

Problem Loading...

Note Loading...

Set Loading...