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
1000.26Nasty Page Fold
1000.55Novice Bagpipers
1027.42Siamese Fighting Fish
1090.26Equitable Cake Cutting
1170.23Yearbook Earnings
1180.37Dogs, Cats, Snakes
1180.46Bike to the Beach
1180.66The Problem Before . . .
1310.25Super Venn Diagram
1365.11Decimals On Screen
1470.41A Giant Sum
1550.15Rooster, Goose, Duck Prices
1650.12Jasper's Marbles
1650.13Wok Around the Clock
2050.41Six Nine's Make A Hundred
2070.61Big Round Dinosaur Buttons
2210.71Point on a Line. Making a Triangle?
2210.81An Inequality with Radicals
2230.62Two Quadratics
2232.11From a Progression to a Quadratic
2430.11Three Valves
2440.41York to London
2440.77Barnabas and the Overpass
2460.29Present and Future Ages III
2490.32The Grow'm Good Nursery
2530.51Defined Operation 3; Do Composition
2580.51A Hard Functional Equation
2850.65A Sequence by Subtraction
2870.21A Mixed Geometric and Arithmetic Sequence
3070.11Algebra with Angles
3440.12Billy the Goat
3440.43Fencing Inside a Circular Field
3500.51Gertrude the Goldfish
4220.21Circumnavigating the Earth by Plane