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Intermediate Algebra
| Status | Title | Difficulty |
| 1813. Projection Vector Determination | Level 2 | |
| 1814. Triangle Area Calculation 2 | Level 4 | |
| 1815. Point to Plane Distance | Level 2 | |
| 1816. Tangent Angle Calculation 2 | Level 3 | |
| 1817. Trigonometric Ratio Determination 1 | Level 5 | |
| 1818. Minimum Dot Product | Level 3 | |
| 1819. Polar Graph Min X Coordinate | Level 5 | |
| 1820. Orthogonal Vector Ratio | Level 3 | |
| 1821. Orthogonal Vector Condition | Level 3 | |
| 1822. Arcsine Sum Conversion | Level 2 | |
| 1823. Secant Tangent Sum | Level 4 | |
| 1824. Cosine Sine Equality | Level 5 | |
| 1825. Cosine Degree Conversion | Level 5 | |
| 1826. Vector Cross Product Dot | Level 3 | |
| 1827. Tetrahedron Vertex Coordinates | Level 4 | |
| 1828. Largest Rational Cosines | Level 5 | |
| 1829. Smallest Positive Angle | Level 2 | |
| 1830. Recursive Function Product | Level 5 | |
| 1831. Spherical Coordinate Transformation | Level 5 | |
| 1832. Arctan of Square Root | Level 1 |