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3 WEEKLY INTERACTIVE PUZZLES
PUZZLE CLASSICS
- 1 to 8 into the Vertices of a Cube
- 1, 2, 3, 4, 5, 6, and 7 to 100
- 10 Dots: Equilateral Triangles
- 12 Dots: How Many Squares?
- 20 Dots: How Many Squares?
- 300 to 400
- 8 + 8 = 4
- 9 Dots: How Many Squares?
- 9 Minutes with Two Hourglasses
- 9 Weights
- A Basket of Eggs
- A Beanstalk Conundrum
- A Birthday Riddle
- A Bottle and a Cork
- A Bottle's Volume
- A Broken Clock Face
- A Chessboard and Grains of Rice
- A Chessboard Challenge
- A Child's Age
- A Cone, A Sphere, A Cylinder
- A Cube Through Cube
- A Cyclist
- A Five-Digit Number
- A Flock of Ducks
- A Herd of Cows
- A Hexagon From a Cube
- A Hundred Grapes
- A Man and his Wife - How old?
- A Pencil Challenge
- A Swarm of Bees
- A Three-Digit Number
- A Unique 10-Digit Number
- A Watch Face
- A Weather Forecast
- AB + 20 percent = BA
- Adding the X
- All... But Two
- Apple Pickers
- Apples in a Box
- Area of the Shaded Part
- Around the World
- Arrows to the Word
- Average Speed
- Between 2 and 3
- Birthday Candles
- Bookworm
- Boston - New York Trains
- Boxes & Balls
- Bread's Weight
- Broken Digital Clock
- Brothers and Sisters, I Have None
- Buddhist Monk Puzzle
- Calculate the Weight
- Chicken, Cat, Goat: Fractions
- Circle Relationship
- Circles and Hexagons
- Cities, Forests, Water...
- Complete the Square
- Congruent Parts: L-Shape
- Congruent Parts: Sphynx
- Congruent Parts: Trapezium
- Counting Triangles
- Crazy Cut
- Crossing Hour and Minute Hands
- Crossing Out the 9 Dots
- Cubed Calendar
- Cutting the Shape: Getting the Square
- Digging the Holes
- Digits in the 1-100 range
- Dissecting a Horseshoe
- Doctor’s Son
- Drawing Balls
- Eight Cards
- Eight Queens Puzzle
- Farmer & Apples
- Final Parts from Lead Billets
- Finding the Center of a Circle
- Five 1s to One Hundred
- Five 2s to 28
- Five 3s to 37
- Five 4s to make 55
- Four 9s to make 20
- From 1 to 7 in the Triangle
- From 1 to 7 in two Circles
- Full of Keys
- Get 99
- Grandpa and Lollypops
- GTNTL...
- Handshakes at a Meeting
- Hexagon In-Out
- Hotel Guests and Extra $1
- Hourglasses: 5-min Egg
- Hourglasses: Boiling an Egg
- How Many Brothers and Sisters?
- How Many Brothers and Sisters? Part 2
- How Many Pentagons?
- How Many Regular Hexagons?
- How Many Squares? Part 1
- How Many Squares? Part 2
- How Many Triangles? Part 1
- How Many Triangles? Part 2
- How Many Triangles? Part 3
- How Many Triangles? Part 4
- How Old am I?
- Interesting Fractions
- Into the Woods
- Is There Such A Number?
- Jigsaw Clusters
- Magic Circle
- Magic Square
- Magic Triangle-17
- Magic Triangle-20
- Meeting the Trains
- Minute, Moment, Thousand Years
- Missionaries & Cannibals
- Move One Digit - Get It Right
- Name the Number
- Network of Twos
- New Year's Oranges
- Not a Nickel
- O, T, T,...
- Overlapping Napkins
- Polygon Areas
- Puzzling Scales. Part 1
- Repairing a Chain
- Running Competition
- Score 100
- Send More Money
- Send More Money + Gold
- Seven Pets
- Shaded Area: Leaf in a Square
- Shaded Area: Star in the Square
- Shortest Catch
- Six Glasses Problem
- Snap Crackle and…?
- Soccer Players
- Socks in a Box
- Sphere & Cylinder: Surface Areas
- Square 5x5 into 4x4 and 3x3 Squares
- Squares from the Pegs
- Squares-in-Squares - Unicursal
- Star Strips
- Taking More, Growing More
- Ten Bags of Coins
- Tetra Volume
- The 1st Riddle of the Sphinx
- The 2nd Riddle of the Sphinx
- The 3 Croutons’ Challenge
- The 3-gal and the 5-gal Bottle Puzzle
- The 6 Glasses Problem
- The Air Parade
- The Dice’ Stack
- The Geese Flock
- The Hindu Squares
- The Missing Symbol
- The Missing Symbol 2
- The Price of a Book
- The Puzzled Driver
- The Sequence
- The Sleeping Passenger
- The Snail Challenge
- The Triangular Cat
- The Volume of Which Cylinder is Bigger?
- The Wolf, Goat and Cabbage Challenge
- Three Neighbors
- Three Peasants, Eight Naan Breads
- Three Squares in One Line
- Trilateral Walk
- Two Fathers, Two Sons
- Two Ropes
- Two Trains
- Upside-Down Year
- Water Lilies
- Water Pouring Puzzle - 8oz, 5 oz, 3oz
- What is It?
- What is the Profit?
- What's Before Me?
- Which Statement is True?
- X, Y, Z - Add & Multiply
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3D Geometry: Volumes
Tetra Volume
A tetrahedron has been sliced from a cube, as is shown. Can you figure
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Digits & Numbers
A Three-Digit Number
I am thinking of a three-digit number. If you subtract 7 from it, the resul
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Logical Reasoning
A Birthday Riddle
Yesterday I was 25. Next year I will be 28. What day this was said on?
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Movements & Speed
The Puzzled Driver
The odometer of the family car shows 15,951 miles. The driver noticed that
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3D Geometry: Volumes
NEWJun 30
A Pencil Challenge
How many edges does a hexagonal pencil have?
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Logical Reasoning
The Price of a Book
A book costs $1 plus half its price. How much does it cost?
CHESS PUZZLES
- Arctic Knights
- C-Slide Knights
- Eight Knights in the Seven
- Four Knights Guarini's Problem
- G-Knights Exchange
- H-Steeplechase
- Horses by the Pond
- Knight Squadrons
- Knights and Fish
- Knights in Shallop
- Knights in the Castle
- Knights' Stone Cross
- Knight’s Maneuvers
- Six Knights Guarini's Problem
- The Knight Maze
- U-Steeplechase
- X-Steeplechase
- Y-Steeplechase
- Z-Steeplechase
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Knights 3:3
Cells12
Moves7
NEWMay 11
H-Steeplechase
Another chess puzzle in the STEEPLECHASE series. This time the board is in
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Knights 3:3
Cells15
Moves9
Knights in Shallop
There is one cell in this board which you would never occupy while untangli
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Knights 3:3
Cells12
Moves11
Six Knights Guarini's Problem
Known as the 2nd challenge in the Guarini's Chess Problems series. Attribut
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