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Dr. K
  • Home
  • About
    • Biography
    • PhD
    • University of Michigan
    • Family
    • My Dog, Yeti
    • with Famous Mathematicians
    • Museum of Math (MoMATH)
    • StreetSquash Harlem
    • US Army Service
    • Bicycles and Motorcycle
    • NYC Deli Cats
  • Bitcoin
  • Tricks
    • Number Guessing
      • Guess Your Number
      • Honest Liar
      • 2-Digit Mind Reader
      • Cubic Root Calculation
    • Check Digits
      • Check Digit Algorithms
      • Check Digit Anchor Charts
      • Check Digit Worksheets
      • Check Digit Calculator
      • 8-Digit Barcode
      • 12-Digit Barcode (UPC)
      • 13-Digit Barcode (ISBN)
      • 14-Digit Barcode
      • 15-Digit Credit Card (American Express)
      • 16-Digit Credit Card (VISA & MasterCard)
      • 17-Digit VIN
      • 18-Digit Barcode
    • Calculator Tricks
      • 3-peat 777
      • 6-peat 777,777
      • 9-peat 777,777,777
      • Devil's 666
      • 3-Digit Repeat 123 123
      • 4-Digit Repeat 1234 1234
      • 5-Digit Repeat 12345 12345
      • Guess Your Birthday
      • 6 Times Even
    • Pretend Mental Math
      • Addition 18
      • Calendar Math Tricks
    • Ancient Calculators
      • Multiplication By Lines
      • Roman Multiplication
      • Lattice Multiplication
      • Napier Bones Multiplication
      • Slide Rules
      • Abacuses
      • Division By Dots
    • Binary Holes Sorting
    • Magic Card Tricks
      • 4th Card
      • 1/7
      • Four Sevens
      • 2 More & Get You To 20
    • Math Talks
    • Full Precision Calculator
  • Puzzles
    • Wordle, Nerdle, and More
    • SIMP
    • Transum Puzzles
    • Grid Puzzles
      • Calcudoku
      • Skyscrappers
      • Kubok
      • Kakuro
      • Capsules
      • Products
      • Different Strokes
      • Thermometers
      • Arrows
      • Borderlands
    • Assembly Puzzles
      • Wooden Egg
      • Moses' Snake Cube
      • 6-Piece Ball
      • Soma Cube
    • Sliding Puzzles
      • 15 Puzzle
      • Setting Sun Puzzle
      • Colors Disk Puzzle
      • Ball Colors Puzzle
    • Arranging Puzzles
      • Cruiser 4-Piece Wooden
      • Hercules Puzzle
    • Math Blanks Puzzles
      • Magic Triangle
      • Bar Model Fractions
      • Pyramid Addition
      • Not Too Close
      • Hexa-Trex
      • Visual Logic
      • Other Math Puzzles
    • Kinesthetic Puzzles
      • String Handcuffs
    • Art Puzzles
      • Mondrian Math
    • Verbal Logic Puzzles
      • Riddles
      • Emperor's Proposition
      • Alliteration Multiplication Word Problems
    • Counting Puzzles
      • How Many Triangles?
      • How Many Squares?
      • How Many Rectangles?
    • Code Breaking Puzzles
      • Mastermind
    • Optical Illusion Puzzles
  • Games
    • 2-Player Games
      • Connect 4
      • Cat and Mouse
      • NIM - Sea Shells
      • NIM - Matchsticks Pyramid
      • Intransitive Dice
      • Make 15
    • Multi-Player Games
      • Rummikub
      • Blokus
      • Pit
      • SET
      • On The Dot
  • Rubik's Cubes
    • Layer By Layer Method
    • CFOP Method
    • Cubing Culture
    • Mosaics
    • Patterns
    • Calendar Cubes
    • Fruit Cubes
    • Mirror Cubes
    • Giant Cubes
    • Void Cubes
    • Pyramix Cubes
    • Megaminx Cubes
    • Egg Cubes
    • Ivy Cubes
    • Skewb Cubes
    • Oblique Prism Cubes
    • Gear Cubes
    • NxN Algorithms
    • Robots
    • Other Cubes
  • Math Everywhere
    • Math on TV
    • Math In Books
    • Math Augmented Reality
    • Invisible Math
    • Betting Odds in Sports
    • NFL QB Passer Rating
    • Math Memes
    • Math Fails
      • Tonic Water Calories
      • Gym Membership Plans
      • Bloomberg Spending
      • 3 + Dozen = 15
Dr. K
  • Home
  • About
    • Biography
    • PhD
    • University of Michigan
    • Family
    • My Dog, Yeti
    • with Famous Mathematicians
    • Museum of Math (MoMATH)
    • StreetSquash Harlem
    • US Army Service
    • Bicycles and Motorcycle
    • NYC Deli Cats
  • Bitcoin
  • Tricks
    • Number Guessing
      • Guess Your Number
      • Honest Liar
      • 2-Digit Mind Reader
      • Cubic Root Calculation
    • Check Digits
      • Check Digit Algorithms
      • Check Digit Anchor Charts
      • Check Digit Worksheets
      • Check Digit Calculator
      • 8-Digit Barcode
      • 12-Digit Barcode (UPC)
      • 13-Digit Barcode (ISBN)
      • 14-Digit Barcode
      • 15-Digit Credit Card (American Express)
      • 16-Digit Credit Card (VISA & MasterCard)
      • 17-Digit VIN
      • 18-Digit Barcode
    • Calculator Tricks
      • 3-peat 777
      • 6-peat 777,777
      • 9-peat 777,777,777
      • Devil's 666
      • 3-Digit Repeat 123 123
      • 4-Digit Repeat 1234 1234
      • 5-Digit Repeat 12345 12345
      • Guess Your Birthday
      • 6 Times Even
    • Pretend Mental Math
      • Addition 18
      • Calendar Math Tricks
    • Ancient Calculators
      • Multiplication By Lines
      • Roman Multiplication
      • Lattice Multiplication
      • Napier Bones Multiplication
      • Slide Rules
      • Abacuses
      • Division By Dots
    • Binary Holes Sorting
    • Magic Card Tricks
      • 4th Card
      • 1/7
      • Four Sevens
      • 2 More & Get You To 20
    • Math Talks
    • Full Precision Calculator
  • Puzzles
    • Wordle, Nerdle, and More
    • SIMP
    • Transum Puzzles
    • Grid Puzzles
      • Calcudoku
      • Skyscrappers
      • Kubok
      • Kakuro
      • Capsules
      • Products
      • Different Strokes
      • Thermometers
      • Arrows
      • Borderlands
    • Assembly Puzzles
      • Wooden Egg
      • Moses' Snake Cube
      • 6-Piece Ball
      • Soma Cube
    • Sliding Puzzles
      • 15 Puzzle
      • Setting Sun Puzzle
      • Colors Disk Puzzle
      • Ball Colors Puzzle
    • Arranging Puzzles
      • Cruiser 4-Piece Wooden
      • Hercules Puzzle
    • Math Blanks Puzzles
      • Magic Triangle
      • Bar Model Fractions
      • Pyramid Addition
      • Not Too Close
      • Hexa-Trex
      • Visual Logic
      • Other Math Puzzles
    • Kinesthetic Puzzles
      • String Handcuffs
    • Art Puzzles
      • Mondrian Math
    • Verbal Logic Puzzles
      • Riddles
      • Emperor's Proposition
      • Alliteration Multiplication Word Problems
    • Counting Puzzles
      • How Many Triangles?
      • How Many Squares?
      • How Many Rectangles?
    • Code Breaking Puzzles
      • Mastermind
    • Optical Illusion Puzzles
  • Games
    • 2-Player Games
      • Connect 4
      • Cat and Mouse
      • NIM - Sea Shells
      • NIM - Matchsticks Pyramid
      • Intransitive Dice
      • Make 15
    • Multi-Player Games
      • Rummikub
      • Blokus
      • Pit
      • SET
      • On The Dot
  • Rubik's Cubes
    • Layer By Layer Method
    • CFOP Method
    • Cubing Culture
    • Mosaics
    • Patterns
    • Calendar Cubes
    • Fruit Cubes
    • Mirror Cubes
    • Giant Cubes
    • Void Cubes
    • Pyramix Cubes
    • Megaminx Cubes
    • Egg Cubes
    • Ivy Cubes
    • Skewb Cubes
    • Oblique Prism Cubes
    • Gear Cubes
    • NxN Algorithms
    • Robots
    • Other Cubes
  • Math Everywhere
    • Math on TV
    • Math In Books
    • Math Augmented Reality
    • Invisible Math
    • Betting Odds in Sports
    • NFL QB Passer Rating
    • Math Memes
    • Math Fails
      • Tonic Water Calories
      • Gym Membership Plans
      • Bloomberg Spending
      • 3 + Dozen = 15
  • More
    • Home
    • About
      • Biography
      • PhD
      • University of Michigan
      • Family
      • My Dog, Yeti
      • with Famous Mathematicians
      • Museum of Math (MoMATH)
      • StreetSquash Harlem
      • US Army Service
      • Bicycles and Motorcycle
      • NYC Deli Cats
    • Bitcoin
    • Tricks
      • Number Guessing
        • Guess Your Number
        • Honest Liar
        • 2-Digit Mind Reader
        • Cubic Root Calculation
      • Check Digits
        • Check Digit Algorithms
        • Check Digit Anchor Charts
        • Check Digit Worksheets
        • Check Digit Calculator
        • 8-Digit Barcode
        • 12-Digit Barcode (UPC)
        • 13-Digit Barcode (ISBN)
        • 14-Digit Barcode
        • 15-Digit Credit Card (American Express)
        • 16-Digit Credit Card (VISA & MasterCard)
        • 17-Digit VIN
        • 18-Digit Barcode
      • Calculator Tricks
        • 3-peat 777
        • 6-peat 777,777
        • 9-peat 777,777,777
        • Devil's 666
        • 3-Digit Repeat 123 123
        • 4-Digit Repeat 1234 1234
        • 5-Digit Repeat 12345 12345
        • Guess Your Birthday
        • 6 Times Even
      • Pretend Mental Math
        • Addition 18
        • Calendar Math Tricks
      • Ancient Calculators
        • Multiplication By Lines
        • Roman Multiplication
        • Lattice Multiplication
        • Napier Bones Multiplication
        • Slide Rules
        • Abacuses
        • Division By Dots
      • Binary Holes Sorting
      • Magic Card Tricks
        • 4th Card
        • 1/7
        • Four Sevens
        • 2 More & Get You To 20
      • Math Talks
      • Full Precision Calculator
    • Puzzles
      • Wordle, Nerdle, and More
      • SIMP
      • Transum Puzzles
      • Grid Puzzles
        • Calcudoku
        • Skyscrappers
        • Kubok
        • Kakuro
        • Capsules
        • Products
        • Different Strokes
        • Thermometers
        • Arrows
        • Borderlands
      • Assembly Puzzles
        • Wooden Egg
        • Moses' Snake Cube
        • 6-Piece Ball
        • Soma Cube
      • Sliding Puzzles
        • 15 Puzzle
        • Setting Sun Puzzle
        • Colors Disk Puzzle
        • Ball Colors Puzzle
      • Arranging Puzzles
        • Cruiser 4-Piece Wooden
        • Hercules Puzzle
      • Math Blanks Puzzles
        • Magic Triangle
        • Bar Model Fractions
        • Pyramid Addition
        • Not Too Close
        • Hexa-Trex
        • Visual Logic
        • Other Math Puzzles
      • Kinesthetic Puzzles
        • String Handcuffs
      • Art Puzzles
        • Mondrian Math
      • Verbal Logic Puzzles
        • Riddles
        • Emperor's Proposition
        • Alliteration Multiplication Word Problems
      • Counting Puzzles
        • How Many Triangles?
        • How Many Squares?
        • How Many Rectangles?
      • Code Breaking Puzzles
        • Mastermind
      • Optical Illusion Puzzles
    • Games
      • 2-Player Games
        • Connect 4
        • Cat and Mouse
        • NIM - Sea Shells
        • NIM - Matchsticks Pyramid
        • Intransitive Dice
        • Make 15
      • Multi-Player Games
        • Rummikub
        • Blokus
        • Pit
        • SET
        • On The Dot
    • Rubik's Cubes
      • Layer By Layer Method
      • CFOP Method
      • Cubing Culture
      • Mosaics
      • Patterns
      • Calendar Cubes
      • Fruit Cubes
      • Mirror Cubes
      • Giant Cubes
      • Void Cubes
      • Pyramix Cubes
      • Megaminx Cubes
      • Egg Cubes
      • Ivy Cubes
      • Skewb Cubes
      • Oblique Prism Cubes
      • Gear Cubes
      • NxN Algorithms
      • Robots
      • Other Cubes
    • Math Everywhere
      • Math on TV
      • Math In Books
      • Math Augmented Reality
      • Invisible Math
      • Betting Odds in Sports
      • NFL QB Passer Rating
      • Math Memes
      • Math Fails
        • Tonic Water Calories
        • Gym Membership Plans
        • Bloomberg Spending
        • 3 + Dozen = 15

Wordle, Nerdle, and More

SIMP

Transum Puzzles

Grid Puzzles

Assembly Puzzles

Sliding Puzzles

Arranging Puzzles

Math Blanks Puzzles

Kinesthetic Puzzles

Art Puzzles

Verbal Logic Puzzles

Counting Puzzles

Code Breaking Puzzles

Optical Illusion Puzzles

Martin Gardner

1914 - 2010

drkmath777@gmail.com

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