Practice problems across 75+ categories
Practice problems frequently asked at Math • 596 problems | 150 Easy | 283 Medium | 161 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1 | 2 Keys Keyboard | Medium | MathDynamic Programming |
| 2 | 24 Game | Hard | ArrayMathBacktracking |
| 3 | 4 Keys Keyboard | Medium | MathDynamic Programming |
| 4 | A Number After a Double Reversal | Easy | Math |
| 5 | Abbreviating the Product of a Range | Hard | Math |
| 6 | Account Balance After Rounded Purchase | Easy | Math |
| 7 | Add Binary | Easy | MathStringBit Manipulation |
| 8 | Add Digits | Easy | MathSimulationNumber Theory |
| 9 | Add Strings | Easy | MathStringSimulation |
| 10 | Add to Array-Form of Integer | Easy | ArrayMath |
| 11 | Add Two Integers | Easy | Math |
| 12 | Add Two Numbers | Medium | Linked ListMathRecursion |
| 13 | Add Two Numbers II | Medium | Linked ListMathStack |
| 14 | Add Two Polynomials Represented as Linked Lists | Medium | Linked ListMathTwo Pointers |
| 15 | Adding Two Negabinary Numbers | Medium | ArrayMath |
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