1000.16 | Telling Time Backwards, Part II |
1000.22 | Floor Tile Reflection no. 2 |
1000.26 | Nasty Page Fold |
1000.53 | Stella's Fishpond |
1000.54 | Swapping Places |
1000.82 | Acropolis Pattern |
1009.41 | Squares on a Lattice |
1027.12 | Partition This Shape no. 2 |
1027.13 | Partition This Shape no. 3 |
1040.21 | The Wigglesworth Apple Trees |
1050.11 | Penny Triangle |
1070.33 | Snails and Details |
1079.11 | Crabcake |
1090.22 | Cube Frames |
1090.53 | Two Views, One Object |
1180.44 | Social Scale of Boojums |
1180.45 | Biology Lesson |
1180.84 | Mixing Wine and Water |
1190.17 | Digital Clock Minutes |
1230.41 | Hot Potato |
1230.54 | Students and Cars |
1230.71 | Chemical Conundrum |
1280.11 | Toad Tales |
1280.12 | Highland Island |
1320.11 | The Number of Digits in a Product |
1322.11 | Giant Powers of 3 |
1368.21 | Torture with Fractions |
1395.21 | Radical in Radical |
1490.31 | Tie-Dyed T-Shirts |
1510.21 | Pamela Gore |
1540.71 | Stella's Barbecue |
1550.35 | Sandwiches |
1550.38 | Bananas and Pears |
1600.13 | A Prime Number |
1610.12 | Primes in Product |
1610.31 | Nasty Numbers |
1640.41 | Find the Number! |
2050.41 | Six Nine's Make A Hundred |
2070.14 | Ghanaian Shirts |
2070.41 | Stacking Grapefruit |
2070.43 | Big and Little Cubes |
2070.71 | Next Perfect Square |
2070.84 | Particle Motion |
2100.21 | Symmetric Exponents |
2110.11 | Big Product |
2140.11 | Triple Ratio |
2140.31 | Gear Wheels |
2140.71 | Beakers, Ratio of Acid to Water |
2150.11 | Difference of Reciprocals |
2150.22 | Diminished by a Reciprocal |
2150.72 | Find the Equivalent |
2150.81 | A Horrendous Quantity |
2180.11 | Real-valued Radical |
2200.11 | Positive Integer Solutions: Count Them |
2210.11 | Fraction Inequality |
2210.32 | Fractional Inequality |
2210.51 | In-equali-tease |
2210.81 | An Inequality with Radicals |
2211.11 | Absolutely Unequal |
2211.21 | Product with an Absolute Value |
2220.11 | Timbuktu Post Office |
2230.22 | The Golden Ratio |
2230.32 | A Quadratic Question |
2230.62 | Two Quadratics |
2232.11 | From a Progression to a Quadratic |
2250.21 | Strange Equation |
2260.11 | Huge Difference of Squares |
2288.11 | A Symmetric Equation |
2300.11 | Exponential Equation With Threes |
2310.11 | Fleet Street Market |
2310.21 | Coffee Break |
2310.31 | Intersecting Lines |
2310.41 | Parking |
2315.11 | Equations with No Solution |
2410.11 | A Salesman's Commission |
2410.13 | Bertha's Tax |
2410.34 | Wendy the Chemist |
2410.42 | Pompeii Geothermal Corp. Wages |
2420.11 | Hen and a Half |
2420.12 | Hen and a Half, Variables |
2440.32 | Driving to Atlanta |
2440.63 | Rashon and Santiago |
2440.78 | Figure Eight Racing |
2440.82 | Gabriela and her Chauffeur |
2460.15 | The Year the Old Cow Died |
2470.21 | The Barbell Exchange |
2470.62 | Solar Panel |
2480.11 | A Birthday Present in Dimes and Quarters |
2490.11 | Supermarket Apples |
2490.32 | The Grow'm Good Nursery |
2500.61 | Cows, Sheep, Horses |
2500.71 | Airplane Baggage |
2510.31 | The Add-One-Subtract-One Operation |
2580.22 | If . . . Then . . . |
2580.41 | A Seventh Power Equation |
2600.12 | Postage Function, Using [ ] |
2710.11 | Sum of Digits |
2760.21 | Adjacent Corner of a Square |
2761.11 | A Sum of Slopes |
2761.12 | Collinear Vertices of Squares |
2764.11 | Stella's Fishpond II |
2770.21 | Lines! Intersecting! |
2770.31 | Trisection Points |
2788.21 | Circle through (1989,y) |
2850.51 | What's The Next Term? |
2860.51 | Robot Stones |
3060.52 | Red and Blue Point Triangle |
3060.53 | Red and Blue Point Parallelogram |
3060.54 | Red and Blue Points, Right Angle |
3155.61 | Triangle Cleverness |
3310.19 | A Pentangle |
3320.11 | A Ratio of Areas |
3360.21 | Rectangle Decomposition |
3420.24 | Three Equilateral Triangles |
3420.26 | Area of a Hexagon |
3420.27 | Triangle Area |
3420.28 | Shaded Square Area |
3420.51 | Area of a Regular Pentagon |
3420.61 | Two Triangles and a Square |
3420.71 | Hard Triangle Area |
3420.81 | Intersecting Medians |
3440.41 | First: Trisect the Diameter |
3450.21 | Tetrahedron Inscribed in a Cube |
3460.11 | Split That Triangle! |
3470.12 | Radio Antenna |
3470.13 | Clairbouyant |
3500.41 | Water Pipes Stack |
3500.51 | Gertrude the Goldfish |
3550.23 | Our Whirling, Twirling, Swirling World |
3550.51 | A Wheel Within A Wheel |
3560.11 | Intersecting Chords |
3580.11 | Trapezoid |
3750.13 | Wind Farm Fun Facts |
3750.31 | Yobs, Blobs, and Slobs |
4050.12 | Area External to Two Circles |
4050.14 | From Tangent to Sine |
4100.12 | There's A Cosine In It |
4100.21 | Find a Sine |
4120.11 | Insulating Tape |
4200.11 | Tetrahedron Cutoffs |