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Prealgebra
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Precalculus
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Intermediate Algebra
| Status | Title | Difficulty |
| 861. LCM Factorial Expression | Level 5 | |
| 862. Chalkboard Erase Problem | Level 4 | |
| 863. Modular Congruence Puzzle | Level 5 | |
| 864. Cube Factors Count | Level 5 | |
| 865. Set Product GCD | Level 5 | |
| 866. Decimal Conversion 1 | Level 3 | |
| 867. Decimal Representation Sum | Level 3 | |
| 868. Base 10 to Base 6 | Level 3 | |
| 869. Rosa's Age Puzzle | Level 2 | |
| 870. Palindrome Probability | Level 5 | |
| 871. Base 9 Multiplication | Level 4 | |
| 872. Integers GCD LCM Relationship | Level 5 | |
| 873. Sequence Remainder Calculation 1 | Level 5 | |
| 874. Modular Congruence Solution 1 | Level 3 | |
| 875. Modular Inverse Finding | Level 4 | |
| 876. Staircase Step Count | Level 4 | |
| 877. Binary Digits Puzzle | Level 4 | |
| 878. LCM Computation | Level 4 | |
| 879. Modular Power Division | Level 4 | |
| 880. Integer Remainder Puzzle | Level 2 |