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.

TopicStella Number
Visual Problems1000 – 1170
Logical Deduction1180 – 1290, 3750
Arithmetic1300 – 2022
Symbol Manipulation2030 – 2390, 2745, 4100
Algebra Problems2400 – 2500
Analytic Geometry2750 – 2840, 3680 – 3723
Informal Geometry3000 – 3080
Euclidean Geometry3100 – 3650, 3750 – 3850
Trigonometry4000 – 4340
Probability4400 – 4420

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Stella NumberProblem Title
1000.75Scott the Painter
1020.44Dividing the Yin and the Yang
1110.41Digit Cells
1180.23Tony's Hat
1180.41Sherman and Cyrus
1180.65Tennis Tournament
1180.83Vanilla Yoghurt
1190.31Charlie and LaQuanda
1540.34Aggie's Eggs
1550.31Rick's Bed
1610.11One Million
2100.81A Product Plus One
2440.15Rocket Sled
2440.76Jetta versus Corvette
2500.81Euler Problem: Equal Shares of a Fortune
3500.63Four Tangent Circles
3500.71Find the Radius
3510.11Describe that Shape!
4200.42The Vertical Tower
4220.41Stork's Nest