1000.11 | Three Shapes, Three Numbers |
1000.12 | Looping Paths |
1000.14 | Un-Knotting |
1000.15 | Telling Time Backwards, Part I |
1000.16 | Telling Time Backwards, Part II |
1000.21 | Floor Tile Reflection no. 1 |
1000.22 | Floor Tile Reflection no. 2 |
1000.23 | Floor Tile Reflection no. 3 |
1000.26 | Nasty Page Fold |
1000.31 | Tents Among Four Trees |
1000.41 | Non-Intersecting Paths on Grid |
1000.45 | Line Fragments no. 1 |
1000.46 | Line Fragments no. 2 |
1000.47 | Line Fragments no. 3 |
1000.53 | Stella's Fishpond |
1000.54 | Swapping Places |
1000.55 | Novice Bagpipers |
1000.56 | Yearbooks Meet Bookworm |
1000.57 | A Line of Men |
1000.61 | Poison Pills |
1000.65 | An Alphabet Line |
1000.66 | Alphabet Line |
1000.72 | Clock Hands, Purple Flashes |
1000.75 | Scott the Painter |
1000.81 | Continue the Pattern |
1000.82 | Acropolis Pattern |
1000.91 | Chessboard Dominoes |
1000.92 | Students Change Seats |
1000.93 | The Eight Queens Puzzle |
1000.94 | Take a Walk on a Checkerboard |
1007.11 | The Impossible Path |
1007.21 | Trace This Network |
1007.22 | Continuous Line Drawing |
1009.11 | Triangle Count |
1009.21 | Squares on a Checkerboard |
1009.31 | Counting Squares |
1009.41 | Squares on a Lattice |
1010.41 | Sequences of Squares |
1010.42 | More Sequences of Squares |
1020.12 | Covered Shapes |
1020.44 | Dividing the Yin and the Yang |
1027.11 | Partition This Shape no. 1 |
1027.12 | Partition This Shape no. 2 |
1027.13 | Partition This Shape no. 3 |
1027.14 | Partition This Shape no. 4 |
1027.15 | Partition This Shape no. 5 |
1027.23 | Partition This Shape no. 13 |
1027.24 | Partition This Shape no. 14 |
1027.25 | Partition This Shape no. 15 |
1027.26 | Partition This Shape no. 16 |
1027.27 | Partition This Shape no. 17 |
1027.28 | Partition This Shape no. 18 |
1027.31 | Partition This Shape no. 21 |
1027.32 | Partition This Shape no. 22 |
1027.33 | Partition This Shape no. 23 |
1027.42 | Siamese Fighting Fish |
1027.44 | Congruent Gardens |
1030.11 | Nine Dots |
1030.12 | Sixteen Dots |
1030.21 | Utility Lines |
1040.11 | Ten Peach Trees |
1040.21 | The Wigglesworth Apple Trees |
1040.31 | Moving a Circle |
1050.11 | Penny Triangle |
1050.61 | The Rolling Penny |
1060.11 | Disappearing Toothpick Squares |
1060.21 | Toothpick Triangles |
1060.41 | Moving Toothpicks |
1070.11 | Limerick |
1070.13 | The Snail in the Well |
1070.14 | Beetle and Rock |
1070.15 | Pirate Queen Harriet |
1070.16 | Woodie Lott |
1070.18 | Baklava |
1070.19 | Watson's Purchase |
1070.21 | Grandfather Clock Strikes |
1070.31 | You'll Never Guess |
1070.32 | Barrel |
1079.11 | Crabcake |
1079.12 | Weedsport Clothing Boutique |
1079.41 | Word Triangle Arithmetic |
1080.12 | Spirals? |
1090.21 | Labeled Cube Views |
1090.22 | Cube Frames |
1090.24 | Looped Rings |
1090.25 | Bohemian Chain Mail |
1090.26 | Equitable Cake Cutting |
1090.31 | Mixed Sticks |
1090.33 | Cube Patterns |
1090.35 | Cube View 2 |
1090.36 | Cube View 3 |
1090.37 | Cube Identification |
1090.41 | Cutting a Rectangle |
1090.42 | Six Toothpicks |
1090.53 | Two Views, One Object |
1090.61 | A Pile of Cubes |
1090.71 | Twenty-Seven Little Cubes |
1090.72 | Cube, Orange, Made and Unmade |
1090.74 | How Big is This Cube? |
1090.75 | Fly on the Cube |
1090.93 | The Six-Cubed Thing |
1090.94 | The L-shaped Block |
1095.11 | What Lies Opposite? |
1095.12 | The Checker-Boarded Face |
1100.11 | The Old Wooden Disc |
1110.11 | Numbers in Circles |
1110.22 | Around the Corners |
1110.43 | A Fancy 8-Digit Number |
1120.11 | Crossnumber Puzzle no. 1 |
1160.34 | Crypto-Product |
1180.46 | Bike to the Beach |
1180.84 | Mixing Wine and Water |
1180.85 | Errors |
1190.53 | No Weather |
1310.25 | Super Venn Diagram |
2100.32 | Sums of Odd Numbers |
2290.41 | Wine and Punch Bowls |
2440.14 | Trains DC-NYC |
2850.49 | Continue the Sequence |
3050.11 | Fireman on the Ladder |
3060.61 | People In Groups |
3360.22 | City Hall Tile Floor |
3420.12 | Two Squares |
3440.61 | Design for a Pendant |
3440.62 | Area of an Axe Head |
3500.11 | Segment in a Circle |
3500.63 | Four Tangent Circles |
3850.14 | Where Are The Crumbs? |