Saturday, September 19, 2020

The Unwinnable Game

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There are 30 pieces of candy on the table. You and your opponent play in turns. In a turn, the player can take at least 1 and at most 5 c...
Wednesday, October 26, 2016

The 10 Prisoners And The 1000 Bottles Of Wine

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After much preparation, a group of 10 death-sentenced criminals are finally in the opportunity to execute their venomous plan. You might thi...
Saturday, January 16, 2016

The First-Digit Law

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A Coruña 243,870 Ávila 58,358 Barcelona 1,604,555 Bilbao 345,141 Cáceres 95,617 Ciudad Real 74,427 Córdoba 327,362 Cuenca 55,428 D...
Friday, October 23, 2015

The Math Joke

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Three logicians walk into a bar. The barman asks them, “Do you all want a drink?” The first logician says, “I don't know.” The secon...
Wednesday, September 30, 2015

The Einstein Puzzle

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There's a well-known logical puzzle, which is said to have been created by Albert Einstein as a boy. And to make it a bit more juicy, ...
Tuesday, March 17, 2015

The Age Old Problem

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Here we have two completely random people: Anna en Ben. Anna's birthday is in February , while Ben's birthday is in April . Today...
Friday, October 24, 2014

The Incomplete Equation

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Given the following four numbers: 1   5   6   7 The goal is to make the number: 21 Using only these elementary arithmetic operations:...
2 comments:
Sunday, March 30, 2014

The Three Strange Statistics

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Here are three statistics that will make you scratch your head. Of all people that ever lived, 6.7% are still alive today. Whenever you ...
1 comment:
Wednesday, January 22, 2014

The Mind Reader, Part II

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Below you can access an amazing algorithm. It runs remotely on a server park of quantum computers . By giving the algorithm only one num...
Sunday, June 23, 2013

The Prosecutor's Fallacy

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The field of statistics has quite a few types of fallacies up its sleeve. The prosecutor's fallacy is a particularly misleading one. In ...
Friday, December 21, 2012

The Prediction

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✌ ✺ ☃ ❁ ⛅ ☯ ☠ ☺ ❤   Your browser does not have JavaSc...
Friday, August 31, 2012

The Sleep Experiment

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To make a quick buck, you volunteer for a strange experiment. The details of the experiment are explained to you before you start. You arr...
1 comment:
Sunday, April 15, 2012

The Impossible Puzzle

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I'm leaving this one here not necessarily as a puzzle for you to solve, but as an insight in how freaky these math puzzles can get. Thi...
Friday, January 20, 2012

The Impossible Vuvuzela

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Mathematicians can describe a very strange theoretical object, which has two very paradoxic properties. It looks like a horn, or maybe a t...
Wednesday, December 14, 2011

The Mind Reader

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I am thinking of a number between 1 and 9. You can ask me two yes/no questions and I will answer them truthfully. You can't ask me an...
Tuesday, December 13, 2011

The Statistical Anomaly

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“There are lies, damned lies, and statistics.” How is that for starting off with a cliché one-liner!? However, it is true that statistics c...
Thursday, November 17, 2011

The Diagonal Paradox

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Shown here is a square with edges of length 1. The two orange edges will sum up to 2. Additionally, the length of the diagonal can be calcul...
3 comments:
Saturday, October 15, 2011

The Necktie Paradox

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Tom and Michael are both given a cheap necktie by their respective wives for Christmas. At the office Christmas party they start arguing ove...
1 comment:
Thursday, September 8, 2011

The Fuses Riddle

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You have a bunch of fuses, each of which burns for exactly one minute. But, they burn unevenly. That is to say, half a length of fuse does n...
2 comments:
Tuesday, August 23, 2011

The Coastline Paradox

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What is the length of the coastline of Great Britain? If you'd ask the Ordnance Survey (the mapping authority for the United Kingdom),...