Freeflows
All Problems
Prealgebra
Number
Theory
Counting and Probability
Precalculus
Geometry
Algebra
Intermediate Algebra
| Status | Title | Difficulty |
| 1981. Dot Product of Vectors | Level 1 | |
| 1982. Trigonometric Identity Challenge | Level 5 | |
| 1983. Matrix Addition and Multiplication | Level 2 | |
| 1984. Complex Number Series Sum | Level 5 | |
| 1985. Sum of Cosine Values | Level 4 | |
| 1986. Trigonometric Expression Simplification 5 | Level 3 | |
| 1987. Secant and Tangent Relationship | Level 2 | |
| 1988. Line Equation From Parameterization | Level 2 | |
| 1989. Vector Dot Product Calculation | Level 2 | |
| 1990. Cosine of Angle Difference | Level 3 | |
| 1991. Trigonometric Equation Triple | Level 5 | |
| 1992. Real Number Trigonometric Solutions | Level 4 | |
| 1993. Matrix Transformation of Line | Level 5 | |
| 1994. Complex Product Computation | Level 2 | |
| 1995. Simplified Complex Trigonometric Expression | Level 4 | |
| 1996. Coplanar Points Equation Sum | Level 2 | |
| 1997. Cosine Angle Identity | Level 2 | |
| 1998. Sphere Radius Calculation | Level 2 | |
| 1999. Vector Projection Dot Product | Level 4 | |
| 2000. Trigonometric Integer Solution | Level 5 |