Freeflows
All Problems
Prealgebra
Number
Theory
Counting and Probability
Precalculus
Geometry
Algebra
Intermediate Algebra
| Status | Title | Difficulty |
| 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 | |
| 2001. Lines' Acute Angle Cosine | Level 4 | |
| 2002. Matrix Trace and Determinant | Level 4 | |
| 2003. Trigonometric Sum Solution | Level 5 | |
| 2004. Angle Computation in Triangle | Level 3 | |
| 2005. Intersection Angle of Lines | Level 5 | |
| 2006. Complex Sequence Solution Count | Level 4 | |
| 2007. Cosine Squares Sum Simplification | Level 3 | |
| 2008. Minimum Vector Magnitude | Level 5 | |
| 2009. Triangle Side Length Difference 1 | Level 5 | |
| 2010. Volume of Point Set Region | Level 4 | |
| 2011. Sine of Arcsine Sum | Level 2 | |
| 2012. Determinant Zero Condition | Level 4 |