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
1000.57A Line of Men
1000.94Take a Walk on a Checkerboard
1010.11Squares in a Square
1020.23Vacation on a Triangular Island
1020.44Dividing the Yin and the Yang
1020.71Cutting a Sheet Cake
1027.23Partition This Shape no. 13
1027.24Partition This Shape no. 14
1027.25Partition This Shape no. 15
1027.26Partition This Shape no. 16
1027.27Partition This Shape no. 17
1027.28Partition This Shape no. 18
1027.31Partition This Shape no. 21
1027.32Partition This Shape no. 22
1027.33Partition This Shape no. 23
1079.12Weedsport Clothing Boutique
1110.11Numbers in Circles
1110.43A Fancy 8-Digit Number
1140.51A Phone Call
1180.64Paper Thickness
1190.11Charlize's Age
1190.12Light Year
1190.14Running for President
1190.18Breaths in a Year
1190.19Two Erratic Clocks
1190.53No Weather
1230.43Student Body Officers
1230.56Take your Pills
1230.65Identify the card
1270.12Pigeonholes no. 2
1290.15CSD student body
1430.11The Mean 9's
1510.43Ftatateeta's Scarabs
1530.21Choir Risers
1530.32Basil's Age
1530.34Paul's Cheese
1530.36Lake Erie
1550.33Basketball Game Tickets
1560.12Leon Cranville's Picka Numba
1600.21Even Numbers and Primes
1600.41Primes Conjecture
2100.35Fiddling with Exponents
2121.11Unlikely bandanas
2122.41Perfect Square?
2290.41Wine and Punch Bowls
2405.12Pickanumba 1
2405.24Translation into Algebra
2420.34Emptying the Swimming Pool
2452.31Strange Batting Average
2460.13Ezzaldeen's Age
2460.27Jianyi and Dylan's Ages
2460.31Present and Future Ages III
2465.31Dorcas Ducat's Age
2500.51Defeating, Then Passing a Bill
2782.11Minding Your p's and q's
2788.31Two Circles and a Line
2850.41A Recursive Sequence
2860.31Even and Odd Numbered Terms
3060.55Red and Blue Point Octagon
3500.11Segment in a Circle
3500.61Three Circular Disks
3500.63Four Tangent Circles
3510.13Is It a Parallelogram?
3520.11The Balancing Pot
3550.11LP Phonograph Record
3580.13Two Equilateral Triangles
3580.15Estimating Height
3580.17Similarity Exercise
3580.21All Angles
3640.11Basketball in a Box
3650.51Box in a Hat
3650.61Triangular Pyramid
3680.31Finding a Slope
4100.41That's Impossible!