Recently Active Questions
29,037 questions
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Beating Harvard scientists
Long ago, Ivan Panin found 30 ways in which `7' is encoded in Genesis 1:1. He challenged Harvard scientists to create an English sentence with just as many multiples of 7. With all their wisdom and ...
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Square dissection into 4 congruent polygons with same perimeter length of square itself
How can you dissect a square into four non-self-intersecting congruent polygons such that each polygon has the same perimeter length as the given square?
The goal is to have minimal number of edges ...
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A pair of Find-the-stars puzzles
Find-the-stars instructions:
A Find-the-stars puzzle is played on a square grid that is initially empty except some squares contain arrows.
The goal of the puzzle is to fill some empty squares with ...
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Maze Run Puzzle 2.0
So, we gave it another go after reviewing and editing the original post. For context, here's the post: Maze Run Puzzle
SUMMARY:
In the last post I mentioned that me and a friend created the maze run ...
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Two popular bright rivals
Grid missing rival!
Can you figure out who's secretly behind this rivalry? Fill in the nickname accordingly in the grid.
Hint 1:
Hint 2:
EDIT:
Instead of what I've written in the hints above
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Is it possible to put a cooperative checkmate here in three moves?
The puzzle is presented in two versions: full (1) and abbreviated (2).
Is it possible to put a cooperative checkmate here in three moves? (white makes the first move)
h#2,5 (AP) Stepan Nichto. ...
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Both, One, Neither… But With A Twist
There are 99 people in a building. All the people are either Agents or Jokers. You know that at least 50 are Agents (they might all be Agents).
You can point to any two people, and ask to any third ...
- 10.9k
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2014 MIT Aquarium Hunt Puzzle #8
Here is the content of the puzzle (or see https://puzzles.mit.edu/aquarium/2014/8.pdf):
Title: MAKE A WISH FOUNDATION
Flavor: Dear Travel Log, This island is inhabited by solemn beings who look like ...
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Make him shuffle most!
James is a dealer who can only use overhand shuffle. For some reason, you decide to harass on him. You know that he is playing a “stacked deck” with some player. You are also good at it, so you decide ...
- 16.8k
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Filling a 6x6 square with tetronimoes
Consider a square grid of 6 by 6 cells. Can you fill it with 9 tetronimoes (Tetris pieces)? Sure you can! In fact, there are many, many solutions to that. Here is one:
If there are n unique solutions ...
- 21.7k
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Both, One, Neither
There are 99 people in a building. All the people are either Agents or Jokers. You know that at least 50 are Agents (they might all be Agents).
You can point to any two people, and ask to any third ...
- 10.9k
8
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1
answer
683
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Shortest closed path for pilgrims on planet Cube
The planet Cube is an ordinary cube with 6 faces, pilgrims must visit 6 towns, one on each face. The length of any edge of Cube is 3 miles, the cities have the following coordinates (x,y,z) in miles:
...
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Maze Run Puzzle
So, a friend and I created this maze puzzle. Have a go.
The rules are as follows:
Doors open in the direction that they point
Once you move through a door, you cannot go back through it
Empty spaces ...
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Estimating a sum of consecutive prime numbers [closed]
$p_n = 0.069n^2 + 2.229n - 1.85 \ $ can be used to estimate the nth prime number for $ \ 1 \le n \le 25.$
Using some combination of arithmetic, algebra, calculus, by hand, and a calculator, please
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- 2,482
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Making sense of a logic puzzle in Blue Prince parlor room
Context: The game Blue Prince regularly gives the player a specific type of logic puzzle. The setup is that there is a blue box, white box, and a black box. Each box has one or more statements written ...
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