Perimeter Puzzle
What is the ratio between the perimeter of a circle to that of a square that touch as shown in the diagram?
DataGenetics
Blog from DataGentics: Data Decoded. Value Unlocked.
Latest posts
Service Interuption
GoDaddy tanked my site, sorry.
Plant a tree
Can planting a tree make a difference?
Mathematician`s Card Trick
Guessing from three boxes in one try.
NFT Gaming is snake oil
It might be cool technology, but it's totally wrong.
Impossible Dart Scores
What scores is it impossible to obtain in darts?
[0-9] digit puzzle
Rearrange the digits [0-9] to make three numbers: x,y,z such that x+y=z.
Hamiltonian Path Puzzle
Label the grid 1-49 connecting adjacent edges so each shaded cell is prime.
52 card pickup
How many times will you need to pickup a randomly jumbled deck if each time you discard the face-up cards?
Chessboard distances
Minimum number of moves to get to any square.
Bayes, keys, and prisoners
Counterintuitive probability questions.
Inebriated Unlocking
How many attempts to sucessfully unlock a door?
Venn Diagrams
What is the overlap between US States and Chemical Elements?
Missile Command
What is the probability of survival if each missile battery selects its own target?
Windsocks
Why are windsocks striped?
Stopping Traffic
How much energy is wasted to allow you to cross the road?
The sledgehammer and the nut
I should not have written code.
Horse Jumping
How many different ways can you configure seven fence components?
Recycle Logo
Are you sure you are looking at the correct logo?
Fifty Shades of Gray (Socks)
How many socks do you need to take?
Flying Cars
Stop trying to build flying cars!
Containing a one
What percentage of the first billion positive integers contain the digit one?
Rolling, Banking, and Radioactive Decay
What is the expected number of rolls to bank three dice, if rolling a six banks any die, and how does this relate to radioactive decay?
Tunnel Escape
Outrunning a train in two different ways.
How to select fair teams
Evenhanded ways to split a group in two.
Twelve Days of Christmas
How many gifts in total?
Two Dice, Same Score
What are the chances that your total from a pair of dice matches your friend?
Texas Holdem Poker
You are more likely to get a Royal Flush than a King-High Straight Flush!
One Billion
Two numbers multiplied that do not end in zero.
Coffee Time Challenge
Two unknowns in arithmetic and geometric progressions.
Missing Something?
Issue with email alert service.
Fly on a Hexagonal Prism
What is the shortest distance between opposite vertices?
Two Parcels
Which girl has the biggest present?
Ten Switches
Can you open the safe?
How deep is the well?
Equations of motion.
Strictly increasing numbers
How many five digit strictly increasing numbers are there?
Ian and Dog
Overly energetic dog puzzle.
Jessica`s Secret Bracelets
Finding hidden rectangles in beads.
Painted Cube Puzzle
Yet another painted cube puzzle.
Creditcard Number Generator
Generating test numbers.
Coin on a infinite Chessboard
What is the probability a tossed coin will land on a single square?
Romeo and Juliet
How long until the lovers meet?
Buy Me a Coffee?
Help pay for hosting costs.
Six Switch Puzzle
What is the expected number of moves to turn all the lights on?
Soda Can Stability
How much soda should you drink to make your can least likely to tip up?
Three Napkins Puzzle
Covering the biggest square table.
Impossible Baseball
The official rules contain an impossible requirement.
Bomb Defusal
Red wire or Blue wire?
Scrabble Racks
Good and Evil starting racks.
The importance of independence
Diversity is better than duplicated competency.