Freeflows
All Problems
Prealgebra
Number
Theory
Counting and Probability
Precalculus
Geometry
Algebra
Intermediate Algebra
| Status | Title | Difficulty |
| 1961. Product of Sine Functions | Level 4 | |
| 1962. Sum of Imaginary Parts | Level 5 | |
| 1963. Triangle Area Calculation 3 | Level 3 | |
| 1964. Determinant With Real Numbers | Level 4 | |
| 1965. Matrix Determinant Evaluation | Level 4 | |
| 1966. Angle Sum in Triangle Abc | Level 2 | |
| 1967. Cube's Vertex Distance Problem | Level 4 | |
| 1968. Trigonometric Equation Solutions 6 | Level 2 | |
| 1969. Particle Motion Equation | Level 4 | |
| 1970. Intersection of Coordinate Lines | Level 3 | |
| 1971. Curve Type Determination | Level 2 | |
| 1972. Rational Number in Trigonometric Sum | Level 5 | |
| 1973. Parametric Curve Length | Level 3 | |
| 1974. Roots of Unity in Polynomial | Level 2 | |
| 1975. Trigonometric Expression Simplification 4 | Level 2 | |
| 1976. Cosine Equation Solutions 2 | Level 3 | |
| 1977. Trigonometric Function Transformation | Level 5 | |
| 1978. Theta Cosine Sum Evaluation | Level 5 | |
| 1979. Infinite Cosine Series Evaluation | Level 5 | |
| 1980. Matrix Series Determinant Sum | Level 5 |