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
1000.11Three Shapes, Three Numbers
1000.31Tents Among Four Trees
1000.41Non-Intersecting Paths on Grid
1000.45Line Fragments no. 1
1000.47Line Fragments no. 3
1000.55Novice Bagpipers
1000.65An Alphabet Line
1000.66Alphabet Line
1000.93The Eight Queens Puzzle
1007.22Continuous Line Drawing
1009.11Triangle Count
1009.21Squares on a Checkerboard
1010.41Sequences of Squares
1020.15A Triangle with Given Midpoints
1027.44Congruent Gardens
1030.11Nine Dots
1030.12Sixteen Dots
1060.21Toothpick Triangles
1070.12This Man's Father
1070.14Beetle and Rock
1070.15Pirate Queen Harriet
1070.16Woodie Lott
1070.31You'll Never Guess
1070.43Park Run
1079.41Word Triangle Arithmetic
1090.24Looped Rings
1090.33Cube Patterns
1090.36Cube View 3
1090.41Cutting a Rectangle
1090.61A Pile of Cubes
1100.11The Old Wooden Disc
1100.22Continue a Numerical Pattern
1100.52The Flu
1110.44Ten Billiard Balls
1120.11Crossnumber Puzzle no. 1
1140.14Sharing Soda
1160.12ALAS LASS part 2
1180.32Commute to Possum City
1180.46Bike to the Beach
1180.61Mathies and Websters
1180.66The Problem Before . . .
1180.81Horse Race
1190.32The Phone Booth
1192.21Anastasia's Birthday
1200.11Contest Results
1230.21The Gardner, the Baker, and the Fisher
1230.47Ant, Bat, Cat
1230.55Letters and Envelopes
1230.64Card Nonsense
1232.11Soccer Scores
1232.31Six Who Witnessed a Burglary
1280.21Spying on Student Council
1290.13A Hot Air Balloon Club
1307.11Consecutive Integers Sum
1331.11Guess My Age!
1380.11Some Sums
1380.31Find the falsehood
1410.12A Number Pattern
1490.21Prom Bands
1530.33I Have a Good Friend in Maumee
1540.21Golden Oldies
1540.33Hattie's Age in 1900
1540.41Brine Tank
1550.12Malaz, Ron, Debra, and Sabrina
1550.14Toy Rocket
1550.18Jacob's Bumper
1550.26Brick on a 2-Pan Scale
1550.28Swerve's Bikes and Skateboards
1550.42Pythagoras Party
1560.11Picka Numba
1600.31Getting to Fort Wayne
1640.31Ballpoint Pen Sale
2070.13The Price of a Dozen Kumquats
2070.21Mrs. McGillicuddy's Age
2070.23Babysitting Rates
2070.33A Rectangular Box
2070.51Square of Dates
2070.61Big Round Dinosaur Buttons
2070.82Mystery Function
2120.11Messy Numerical Expression
2122.15Pairs of Integers
2152.22Catch a Robber and Maximize Your Reward
2230.31A Circle and a Parabola
2230.41Find the Smallest Root
2240.11A Butterfly Garden
2440.17Maggie and Aggie
2440.93Train Speed
2460.28Present and Future Ages II
2460.29Present and Future Ages III
2460.81An Unlikely Coincidence
2480.31Dividing A Tenner
2490.21Kite Strings
2500.11Pet Rocks
2500.41Milly and Molly Make Muffins. So Do Their Mothers!
2530.11Defined Operation; Find Formula
2530.31Mystery Linear Operation
2530.41Composition with a Defined Operation
2530.51Defined Operation 3; Do Composition
2530.73Strange Salary
2590.12Function Graphs
3060.61People In Groups
3405.11Seven Rectangles
3420.12Two Squares