Practice problems across 75+ categories
Practice problems frequently asked at Apple • 571 problems | 192 Easy | 283 Medium | 92 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 16 | Angle Between Hands of a Clock | Medium | Math |
| 17 | Append K Integers With Minimal Sum | Medium | ArrayMathGreedy |
| 18 | Armstrong Number | Easy | Math |
| 19 | Arranging Coins | Easy | MathBinary Search |
| 20 | Array Partition | Easy | ArrayGreedySorting |
| 21 | Array Transformation | Easy | ArraySimulation |
| 22 | Assign Cookies | Easy | ArrayTwo PointersGreedy |
| 23 | Asteroid Collision | Medium | ArrayStackSimulation |
| 24 | Average of Levels in Binary Tree | Easy | TreeDepth-First SearchBreadth-First Search |
| 25 | Average Salary Excluding the Minimum and Maximum Salary | Easy | ArraySorting |
| 26 | Average Value of Even Numbers That Are Divisible by Three | Easy | ArrayMath |
| 27 | Average Waiting Time | Medium | ArraySimulation |
| 28 | Backspace String Compare | Easy | Two PointersStringStack |
| 29 | Balance a Binary Search Tree | Medium | Divide and ConquerGreedyTree |
| 30 | Base 7 | Easy | MathString |
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