| 1000.15 | Telling Time Backwards, Part I |
| 1000.21 | Floor Tile Reflection no. 1 |
| 1000.81 | Continue the Pattern |
| 1000.91 | Chessboard Dominoes |
| 1007.11 | The Impossible Path |
| 1009.31 | Counting Squares |
| 1020.12 | Covered Shapes |
| 1020.42 | Overlapping Squares |
| 1020.51 | Manhole Covers |
| 1027.11 | Partition This Shape no. 1 |
| 1027.14 | Partition This Shape no. 4 |
| 1027.15 | Partition This Shape no. 5 |
| 1040.11 | Ten Peach Trees |
| 1070.19 | Watson's Purchase |
| 1070.21 | Grandfather Clock Strikes |
| 1090.21 | Labeled Cube Views |
| 1090.42 | Six Toothpicks |
| 1090.71 | Twenty-Seven Little Cubes |
| 1090.73 | Cutting a White Pine |
| 1090.74 | How Big is This Cube? |
| 1090.75 | Fly on the Cube |
| 1100.51 | Agatha the Cow |
| 1100.71 | Martha the Grocer and her Two-Pan Scale |
| 1110.61 | Security Guards |
| 1130.11 | A Magic Square with Primes |
| 1180.37 | Dogs, Cats, Snakes |
| 1180.43 | Gleepers & Blahmies |
| 1230.44 | Glenda Aces a Quiz |
| 1230.53 | Who is in Which Family? |
| 1230.63 | Maurice’s Video Games |
| 1240.11 | A Fox, a Goose, and a Bag of Corn |
| 1250.11 | False Coin no. 1 |
| 1250.12 | False Coin no. 2 |
| 1250.13 | False Coins no. 3 |
| 1260.21 | Handshakes; Fly on the Wall |
| 1290.14 | Gym Class |
| 1310.25 | Super Venn Diagram |
| 1331.14 | Difference of Squares |
| 1332.11 | Whole Number Radicals |
| 1340.41 | LOVE |
| 1340.42 | MISERABLE |
| 1370.21 | Dust Mites |
| 1510.42 | Farmer Fox |
| 1550.22 | In A Dream |
| 1550.24 | Sibyl Bibble |
| 1550.25 | Tree and Nests |
| 1550.27 | Mr. Adams's Will |
| 1550.39 | Trading Cards |
| 1550.43 | A Horse and a Mule Converse |
| 1650.31 | Divisibility Theorem (Sum) |
| 1720.41 | Patterned Equations |
| 1730.41 | Need More Money? |
| 2070.22 | Alyssa's Formula |
| 2100.12 | Who's The Champion? |
| 2100.33 | Sum of Odd Numbers |
| 2100.52 | Rational Expressions, Laws of Exponents |
| 2110.12 | Giant Distribution |
| 2150.21 | Reciprocal Symmetry |
| 2150.41 | Adding x to Numerator and Denominator |
| 2150.62 | Lowest Terms? |
| 2162.11 | An Infinite Continued Fraction |
| 2200.61 | Holstein or Guernsey? |
| 2210.71 | Point on a Line. Making a Triangle? |
| 2230.51 | Jessamine Bush |
| 2260.21 | A Fourth Degree Equation |
| 2290.11 | The Dutch Miller |
| 2290.21 | Ratio-Difference-Sum-Ratio |
| 2410.21 | Tennis Team |
| 2420.41 | The Cow, the Goat, and the Wildebeest |
| 2440.11 | Beef's Lost Loot |
| 2440.12 | Orthodontist |
| 2440.13 | Driving to Nirvana |
| 2440.14 | Trains DC-NYC |
| 2440.31 | Columbus to Cincinnati |
| 2440.33 | Susu the Cat |
| 2440.41 | York to London |
| 2440.51 | Race to the Bus |
| 2440.70 | Snow Tires Versus Ordinary Tires |
| 2442.52 | Daniel Boone on Plum Creek |
| 2452.13 | Fifty Mycologists |
| 2500.21 | Finding Sides of a Triangle |
| 2500.31 | Foxes and Owls |
| 2500.63 | Kumquat House Numbers |
| 2510.11 | Defined Operation no. 1 |
| 2510.21 | Defined Operation no. 2 |
| 2530.52 | Defined Operation 4; Do Composition |
| 2850.21 | Situps |
| 2850.65 | A Sequence by Subtraction |
| 2870.11 | Levy's Basketball |
| 3050.12 | Bugs on a Branch |
| 3060.51 | Red and Blue Point Line Segment |
| 3065.11 | Red/Blue Tubular Neon Lights |
| 3070.11 | Algebra with Angles |
| 3070.12 | A Supplement/Complement Conjecture |
| 3150.11 | Calculating an Angle |
| 3155.22 | A Triangular Garden |
| 3155.41 | A Mystery Angle |
| 3160.11 | Triangle ABC is Isosceles |
| 3261.11 | Quadrilateral BCDF is a Rhombus |
| 3305.51 | Making a Regular Octagon |
| 3305.52 | Stop Sign |
| 3320.21 | A Square Inside a Circle Inside a Square |
| 3321.11 | A Circle and A Square |
| 3350.11 | Overlapping Parallelograms |
| 3360.11 | Mystery Trapezoid |
| 3405.12 | Impossible Rectangle? |
| 3420.22 | The Area of a Cross |
| 3420.25 | The Sum of Two Triangles |
| 3420.29 | Midline Triangle |
| 3420.41 | Dance of the Area Bisectors |
| 3420.73 | Crazy Baseball Diamond |
| 3440.12 | Billy the Goat |
| 3440.13 | A Girl and Her Dog |
| 3440.31 | A Lovely Circular Lawn |
| 3440.51 | Fraction of a Circular Area |
| 3470.14 | Square with Internal Segments |
| 3470.32 | Cardboard Box |
| 3475.11 | The Unknown Edge |
| 3550.21 | Clock with Revolutionary Bug |
| 3580.14 | Akashi-Kaikyo Bridge |
| 3590.11 | Parallelogram and a Geometric Mean |
| 3650.14 | Tennis Balls |
| 3650.21 | Two Barrels |
| 3650.31 | Volume and Surface Area of a Cube |
| 3695.11 | A Square in a Cube |
| 3750.21 | Negating Barbells |
| 3750.41 | Find the Falsehoods |
| 3750.61 | Pickled Walnuts |
| 3750.74 | Toxic Tangles |
| 3850.14 | Where Are The Crumbs? |