Logic Riddles

Logic riddles with answers involve looking at situations and making judgements about them by ruling out impossibilities. If you like solving maths puzzles, you will most probably like logic riddles as well.

Professor Problem

A professor thinks of two consecutive numbers between 1 and 10.

‘A’ knows the 1st number and ‘B’ knows the second number.

They both have a conversation:
A: I do not know your number.
B: Neither do I know your number.
A: Now I know.

There are four possible solutions to this. What are the numbers?

Riddle Answer