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  Puzzles

  Geometry Puzzle: Find the Area of the Arbelos

  May 16, 2026

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  Puzzles

  Matchstick Puzzle: Transform into Three Equilateral Triangles

  May 2, 2026

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  Puzzles

  Logic Puzzle: Measure 6 Hours Using 3 Candles

  January 17, 2026

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  Puzzles

  Logic Puzzle: Fill the Regular Hexagons with Prime Numbers

  January 11, 2026

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  Puzzles

  Geometry Puzzle: Find the Sum of the Areas of the Semicircles Inside the Equilateral Triangle

  January 5, 2026

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  Puzzles

  Geometry Puzzle: Find the Area of the Square from Circle Diameter

  December 30, 2025

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  Puzzles

  Geometry Puzzle: Find the Area of the Square Tangent to the Circle

  December 22, 2025

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  Puzzles

  Geometry Puzzle: Find the Area of the Square

  December 15, 2025

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  Puzzles

  Geometry Puzzle: Find the Area of the Semicircle

  December 7, 2025

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  Puzzles

  Matchstick Puzzle: Create an Odd Number

  November 29, 2025

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  Puzzles

  Matchstick Puzzle: Solve for the Correct Multiplication Result

  November 20, 2025

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  Puzzles

  Matchstick Puzzle: Transform 439 Into a 3-Digit Number, All of Them Even Numbers

  November 11, 2025

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  Puzzles

  Geometry Puzzle: Find the Area of the Triangle

  November 1, 2025

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  Puzzles

  Geometry Puzzle: Find the Area of the Rectangle

  October 22, 2025

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  Puzzles

  Geometry Puzzle: Find the Area of the Painted Shape

  October 11, 2025

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  Puzzles

  Geometry Puzzle: Find the Area of the Big Square

  September 29, 2025

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  Puzzles

  Geometry Puzzle: Find the Area of the Pig’s Face

  September 17, 2025

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  Puzzles

  Geometry Puzzle: Find the Area of the Square

  September 4, 2025

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  Puzzles

  Numeric Puzzle: Write 2014 as the Sum of 3 Squared Numbers

  August 22, 2025

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  Puzzles

  Numeric Puzzle: Write 2014 with the First Four Prime Numbers

  August 14, 2025

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  Puzzles

  Numeric Puzzle: Write 2011 Using Only the Digit 4

  August 2, 2025

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  Puzzles

  Crossnumber Puzzle: Solve the 5 x 5 Grid

  July 18, 2025

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  Puzzles

  Crossnumber Puzzle: Solve the 4 x 4 Grid

  July 3, 2025

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  Puzzles

  Crossnumber Puzzle: Solve the 3 x 3 Grid

  June 17, 2025

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  Puzzles

  Logic Puzzle: Find Missing Values in Domino Multiplication

  June 1, 2025

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  Puzzles

  Logic Puzzle: Find All Domino Squares with 12 Points

  May 14, 2025

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  Puzzles

  Logic Puzzle: Find the Fourth Domino in the Sequence

  April 26, 2025

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  Puzzles

  Geometry Puzzle: Find the Fraction of a Big Circle That is Painted

  April 7, 2025

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  Puzzles

  Geometry Puzzle: Find the Area of a Square Inside a Circle

  March 19, 2025

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  Puzzles

  Geometry Puzzle: Find the Area of a Kite in an Isosceles Triangle

  February 28, 2025

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  Puzzles

  Matchstick Puzzle: Transform Four Congruent Squares Into Two Squares

  February 9, 2025

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  Puzzles

  Matchstick Puzzle: Transform 403 Into a Number Divisible by 9

  January 21, 2025

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  Puzzles

  Matchstick Puzzle: Transform a Trapezoid/Trapezium Into Two Equilateral Triangles

  January 1, 2025