John is a strange liar. He lies on six days of the week, but on the seventh day, he always tells the truth. He made the following statements on three successive days: Day 1: "I lie on Monday and Tuesday." Day 2: "Today, it"s Thursday, Saturday, or Sunday." Day 3: "I lie on Wednesday and Friday." On which day does John tell the truth?
I have nine bottles of wine and one of the nine bottles is poisoned. I need to find the poisoned bottle with two facts (1) Poison is deadly, only a sip will cost death (2) I have two mice to do so. How should I do it?
I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?
I am white when I am dirty, and black when I am clean. What am I?
I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?
What can you see in the middle of March and April that you can never see in any other month?
Can you find the odd number in the following? 2716, 4135, 5321 and 7145
What English word has three consecutive double letters?
How many triangles can you count in the figure given?
If a wheel has 54 spokes, how many spaces are there between the spokes?
Can you figure out the logic I used to decide the order of the following words: gun, shoe, spree, door, hive, kicks, heaven, gate, line, den
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
