# Puzzles

- Intro to the puzzles section
- More difficult vs more tedious
- Digit sum
- Solving linear inequalities
- Division
- Classifying quadrilaterals
- Eulerian path puzzles
- Coin toss puzzle
- Combinations
- Round-robin tournament puzzle
- Surface area of composite cuboids
- Solving exponential equations
- Converting decimal to binary
- Latin cubes puzzle
- Coloring puzzles
- Platonic solids
- Making Venn diagrams
- Application of Bézout's identity to sand timer puzzles
- Decimal addition and subtraction
- Decimal addition and subtraction
- Domino puzzles
- Intro to the floor and ceiling functions
- Space diagonals of a cuboid
- Convex and concave polygons
- More on tangrams
- Cut up and rearrange puzzles
- Classifying angles
- Maximum polygons on a square grid of dots
- Tic-tac-toe and Connect 4
- Add or remove k dots puzzles
- Factorial puzzles
- Intro to the imaginary unit i
- Properties of even and odd numbers
- Longest path in a square grid
- Puzzles involving nets of polyhedra
- 2D and 3D crosses
- A hole new board game puzzle
- Making boxes
- Formula for the triangular numbers
- Square inside a semicircle
- Regular polygon compass circles
- Polycircles
- Number of regions created by overlapping circles
- Count the shapes in a grid
- Extending the Olympic rings puzzle
- Extending the Monty Hall problem
- Extending the 9 dots problem
- Linear inequalities
- Exponents
- Tangent-secant theorem
- Classifying triangles
- Find the value of one expression from another
- Formula for the height of an equilateral triangle