Practice problems across 75+ categories
Practice problems frequently asked at Math • 596 problems | 150 Easy | 283 Medium | 161 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 16 | Airplane Seat Assignment Probability | Medium | MathDynamic ProgrammingBrainteaser |
| 17 | Alice and Bob Playing Flower Game | Medium | Math |
| 18 | Allocate Mailboxes | Hard | ArrayMathDynamic Programming |
| 19 | Alternating Digit Sum | Easy | Math |
| 20 | Angle Between Hands of a Clock | Medium | Math |
| 21 | Append K Integers With Minimal Sum | Medium | ArrayMathGreedy |
| 22 | Apply Operations to Make Sum of Array Greater Than or Equal to k | Medium | MathGreedyEnumeration |
| 23 | Apply Operations to Maximize Score | Hard | ArrayMathStack |
| 24 | Armstrong Number | Easy | Math |
| 25 | Arranging Coins | Easy | MathBinary Search |
| 26 | Average Value of Even Numbers That Are Divisible by Three | Easy | ArrayMath |
| 27 | Base 7 | Easy | MathString |
| 28 | Basic Calculator | Hard | MathStringStack |
| 29 | Basic Calculator II | Medium | MathStringStack |
| 30 | Basic Calculator III | Hard | MathStringStack |
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