mcherm : puzzles   35

The 52-Card Challenge : mathriddles
A challenging, surprising, and interesting math puzzle. A variant of the 100 prisoner problem.
math  puzzles  via:reddit
november 2019 by mcherm
A more interesting algebra puzzle than typical. - math
A good algebra problem for kids. "How many cats are n the box?"
math  puzzles  via:reddit
september 2017 by mcherm
A programming challenge puzzle (well, 50 puzzles) that looks pretty interesting.
programming  puzzles  via:NedBatchelder
may 2016 by mcherm
Answer to a 150-Year-Old Math Conundrum Brings More Mystery | WIRED
An interesting tale about a proof of a math problem simple enough to explain. And it also comes with an interesting set of puzzles ranging from moderate to difficult.
math  wired  puzzles  via:reddit
june 2015 by mcherm
Will you play the "Red and Black" card game? - Boing Boing
A very simple math puzzle, but suitable for doing with children.
math  puzzles
february 2015 by mcherm
Impossible Escape?
64 randomly or maliciously flipped coins placed on a chessboard. Opponent selects a square. You must convey which one to a confederate by flipping just one coin over.
math  puzzles  mathpuzzle  via:reddit
february 2015 by mcherm
A Rubik's cube solution that is easy to memorize
A very well-done page to easily memorize a formula for beating the Rubik's cube.
puzzles  rubikscube  via:CedricBeust
december 2014 by mcherm
2048
Match the blocks.
game  onlinegame  puzzles  via:reddit
march 2014 by mcherm
Is there a number that follows 2x = reverse digits of x : math
In some bases there are numbers such that 2x is x with the digits reversed. Which bases?
math  via:reddit  puzzles
august 2013 by mcherm
Delightful Puzzles
Some REALLY GOOD math puzzles.
via:HackerNews  puzzles  math  todo
july 2013 by mcherm
Coin Puzzle: Predict the Other's Coin | Hacker News
Two people predicting the other's coin flips moire often than you'd expect.
math  probability  puzzles  via:HackerNews
december 2012 by mcherm
Zeckendorf’s Theorem & Simple Code Implementation | Swageroo Algorithms
A good math puzzle: all positive integers are uniquely the sum of non-consecutive Fibonacci integers.
math  puzzles  via:reddit
october 2012 by mcherm
Puzzles.COM - Logic Puzzles - All GridWorks
Some logic puzzles. Starts really easy (6-yr-old level) and goes to fairly challenging.
math  puzzles  logic
january 2012 by mcherm
Blue Eyes - A Logic Puzzle
Leave the island if you learn your eye color.
RandallMunroe  math  puzzles  via:reddit
september 2011 by mcherm
Delightful Puzzles «
Some interesting math puzzles.
math  puzzles
march 2010 by mcherm
Algorithm X in 30 lines!
A sudoku solver in about 30 lines of code.
puzzles  sudoku  python  programming  via:reddit  personal_net
march 2010 by mcherm
Still More JavaTM Puzzlers
8 REALLY HARD really simple java code puzzles.
java  programming  puzzles  fun  via:BillTheLizard
september 2009 by mcherm
A Programming Interview Question, Explored
A knight, a dragon, and 6 poisoned wells.
math  puzzles
september 2008 by mcherm
Index of Bongard Problems
A large collection of "Bongard problems" (determine-the-rule problems based on simple drawings).
puzzles  fun  game  logic  math
january 2008 by mcherm
The "Eternity Puzzle"
VERY difficult jigsaw puzzle solved (over a period of years) by mathematicians. Article details the techniques used, which are interesting.
math  puzzles  personal_net  games
may 2006 by mcherm

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