Have you ever wondered why quizzes and riddles form an integral part of any intelligence test? The following incident will help you understand the importance of patterns. During World War II, the British were striving hard to break the Enigma code, the machine used by the Germans for encrypting their messages. The army recruited Alan Turing for the task. He wanted a team to help him, for which he conducted an exam. Many of you would be amazed to know what he asked in the exam that determined the destiny of a country!