Problems
Here's a basic chart showing what's where in this long list of problems. There are two fully detailed lists in the User Guide: SDS Topics in Alphabetical Order and SDS Topics in Numerical Order.
| Topic | Stella Number |
|---|---|
| Visual Problems | 1000 – 1170 |
| Logical Deduction | 1180 – 1290, 3750 |
| Arithmetic | 1300 – 2022 |
| Symbol Manipulation | 2030 – 2390, 2745, 4100 |
| Algebra Problems | 2400 – 2500 |
| Analytic Geometry | 2750 – 2840, 3680 – 3723 |
| Informal Geometry | 3000 – 3080 |
| Euclidean Geometry | 3100 – 3650, 3750 – 3850 |
| Trigonometry | 4000 – 4340 |
| Probability | 4400 – 4420 |
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| Stella Number | Problem Title |
|---|---|
| 1010.11 | Squares in a Square |
| 1020.15 | A Triangle with Given Midpoints |
| 1020.23 | Vacation on a Triangular Island |
| 1020.42 | Overlapping Squares |
| 1020.44 | Dividing the Yin and the Yang |
| 2070.43 | Big and Little Cubes |
| 2210.41 | Distance on the Number Line |
| 2760.21 | Adjacent Corner of a Square |
| 2761.11 | A Sum of Slopes |
| 3070.12 | A Supplement/Complement Conjecture |
| 3150.11 | Calculating an Angle |
| 3155.21 | Jasmine and Biscuit |
| 3155.22 | A Triangular Garden |
| 3155.41 | A Mystery Angle |
| 3155.51 | A Narrow Sinister Alley |
| 3160.11 | Triangle ABC is Isosceles |
| 3232.11 | Triangle-ing |
| 3261.11 | Quadrilateral BCDF is a Rhombus |
| 3305.11 | Diagonals of Two Regular Polygons |
| 3305.52 | Stop Sign |
| 3310.11 | Sum of Interior Angles |
| 3310.19 | A Pentangle |
| 3320.11 | A Ratio of Areas |
| 3320.21 | A Square Inside a Circle Inside a Square |
| 3350.11 | Overlapping Parallelograms |
| 3360.11 | Mystery Trapezoid |
| 3410.32 | Squares Make An Octagon |
| 3420.22 | The Area of a Cross |
| 3420.24 | Three Equilateral Triangles |
| 3420.25 | The Sum of Two Triangles |
| 3420.26 | Area of a Hexagon |
| 3420.27 | Triangle Area |
| 3420.29 | Midline Triangle |
| 3420.41 | Dance of the Area Bisectors |
| 3420.43 | Regular Triangle, Regular Hexagon |
| 3420.61 | Two Triangles and a Square |
| 3420.71 | Hard Triangle Area |
| 3420.73 | Crazy Baseball Diamond |
| 3420.81 | Intersecting Medians |
| 3440.12 | Billy the Goat |
| 3440.13 | A Girl and Her Dog |
| 3440.31 | A Lovely Circular Lawn |
| 3440.41 | First: Trisect the Diameter |
| 3440.43 | Fencing Inside a Circular Field |
| 3440.51 | Fraction of a Circular Area |
| 3450.21 | Tetrahedron Inscribed in a Cube |
| 3470.12 | Radio Antenna |
| 3470.14 | Square with Internal Segments |
| 3470.21 | Distance in flight |
| 3470.32 | Cardboard Box |
| 3470.51 | A Triangle in a Circle |
| 3470.61 | Barber Pole |
| 3500.21 | Midpoint of a Chord? |
| 3500.31 | Circle Around Three Squares |
| 3500.41 | Water Pipes Stack |
| 3500.51 | Gertrude the Goldfish |
| 3500.61 | Three Circular Disks |
| 3500.63 | Four Tangent Circles |
| 3510.12 | Parallelogram? |
| 3510.13 | Is It a Parallelogram? |
| 3550.11 | LP Phonograph Record |
| 3550.23 | Our Whirling, Twirling, Swirling World |
| 3550.24 | Put Your Hands Together |
| 3550.44 | Walking the Equator |
| 3550.51 | A Wheel Within A Wheel |
| 3560.11 | Intersecting Chords |
| 3580.11 | Trapezoid |
| 3580.13 | Two Equilateral Triangles |
| 3580.14 | Akashi-Kaikyo Bridge |
| 3580.15 | Estimating Height |
| 3580.17 | Similarity Exercise |
| 3580.21 | All Angles |
| 3590.11 | Parallelogram and a Geometric Mean |
| 3615.51 | Parallelepiped |
| 3640.11 | Basketball in a Box |
| 3650.11 | Peanut Butter Pricing |
| 3650.14 | Tennis Balls |
| 3650.15 | Pouring Water |
| 3650.23 | Big Rectangular Solid |
| 3650.41 | Pouring Between Glasses |
| 3650.51 | Box in a Hat |
| 3650.61 | Triangular Pyramid |
| 3680.31 | Finding a Slope |
| 3695.11 | A Square in a Cube |
| 3850.11 | Rhombi, Locus of Vertex |
| 4050.12 | Area External to Two Circles |
| 4220.11 | View to the Horizon |