Questions tagged [real]

Question 1

I was filling out the rightmost column of this set of cells from top to bottom. (The content of that column is intended to be manually calculated using the numbers to the left plus some hidden weights,...

Question 2

I had an interesting conversation over lunch last week. The discussion was if we can use the cosmic microwave background (or CMB in short) to cook food. Here’s a more relatable question. You must have ...

Question 3

There are 100 full water tanks and 100 empty ones. You are given a hose that can connect any two of them in order to equilibrate the water level between them. All the tanks are cubical in shape, of ...

Question 4

I have this box that is shaped like a book, possibly a decorative or puzzle box. I'm trying to figure out how to open it. I’ve searched online but couldn’t find any instructions or similar designs. ...

Question 5

Beginner level puzzle, I guess, or, at least, an easy one. High reputation members, perhaps refrain to answer immediately Using only pencil and paper, so without access to any physical CD (Compact ...

Question 6

The Lego train system has this switch element: If the switch is set as shown in the image, the following happens: If a train drives in via A nothing changes. If a train drives in via B the direction ...

Question 7

I took this photo from a plane over Australia. Why is there a path running down the middle?

Question 8

Bob is carrying a solid, heavy, sealed box of uniform density up a long flight of uniform steps. He'd like to take a break halfway and set the box down, but each of the box's dimensions is more than ...

Question 9

I was walking and saw this cipher does any one know how to crack it?

Question 10

You are in a crowded train, you want to take a piss. So you go inside a toilet to find somebody shitted badly and the commode has filled up and shit all around. You try to flush but no water. So you ...

Question 11

The man wishes to remove this string loop from his right hand without cutting the string. His right hand is inside his pocket and he isn't allowed to take out this hand from the pocket. He can only ...

Question 12

In the group stage of this year's UEFA European Football Championship, teams compete within six groups of four teams each. Each group plays a round-robin tournament, in which each team plays three ...

Question 13

Not every question has to be as hard as possible, here is an easy one. I joined my kids playing with duplo, and found out that the duplo 9 and 6 look exactly the same if you turn one of them 180 ...

Question 14

Was Exhibit 5 of the Chaocipher (published c.1991) ever solved, and if so, who solved it and when? Chaocipher is a cipher that was created by J.F. Byrne in 1918 as a machine-based cryptography system,...

Question 15

I was driving on the highway and saw a car with the following sign: "Caution: blind driver". I checked and the sign was describing true events. How can this be possible?

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Questions tagged [real]

What pattern did Excel see in my data?

Focusing sunlight to cook food

Moving water by repeated equilibration

Help me unlock this box

A musical ratio

Drive Lego train in both directions

Path from plane

Setting a box on the stairs

Cipher seen while walking

shit puzzle : Prove your innocence [closed]

How can the man remove the string loop hanging from his right hand?

Reconstructing Euro results

Which duplo digit is 6 or 9?

Was Exhibit 5 of the Chaocipher ever solved, and if so who solved it and when?

How can this be?

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