You drive to the store at 20 mph and return by the same route at 30 mph. Discounting the time spent at the store, what was your average speed?
Riddle AnswerLogic Riddles
The Three Gods
Three Gods A, B, and C are called, in no particular order, True, False, and Random. True always speaks truly, False always speaks falsely, but whether Random speaks truly or falsely is a completely random matter.
Your task is to determine the identities of A, B, and C by asking three yes-no questions; each question must be put to exactly one God. The Gods understand English, but will answer all questions in their own language, in which the words for yes and no are “da” and “ja”, in some order. You do not know which word means which.
- It could be that some God gets asked more than one question (and hence that some God is not asked any question at all).
- What the second question is, and to which God it is put, may depend on the answer to the first question. (And of course similarly for the third question.)
- Whether Random speaks truly or not should be thought of as depending on the flip of a coin hidden in his brain: if the coin comes down heads, he speaks truly; if tails, falsely.
- Random will answer “da” or “ja” when asked any yes-no question.
What would your three questions be?
Riddle AnswerTeapots Puzzle
I Was Was
Russian Roulette
You were captured and given one chance to escape with your life. You’re forced to play Russian Roulette with a 6-cylinder pistol. Each cylinder can hold 1 bullet. The gun has 2 bullets in it and the rounds were placed consecutively and the barrel was spun.
You took one shot and heard the click, luckily you didn’t get a bullet. You can choose to spin the barrel before the next shot. You want to live. Should you spin the barrel to improve your chances of survival?
Riddle Answer