Math Interview Questions

Array Math Binary Indexed Tree Segment Tree Geometry Sorting Enumeration

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#227MediumFrequency: 96%

Basic Calculator II

Math String Stack

Rank

#415EasyFrequency: 94%

Add Strings

Asked at Oracle

Math String Simulation

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#2MediumFrequency: 93%

Add Two Numbers

Linked List Math Recursion

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#7MediumFrequency: 88%

Reverse Integer

Math

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#912MediumFrequency: 87%

Random Pick with Weight

Array Math Binary Search Prefix Sum Randomized

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#50MediumFrequency: 85%

Pow(x, n)

Hash Table Math Reservoir Sampling Randomized

Math Recursion

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#398MediumFrequency: 82%

Random Pick Index

Asked at Oracle

#10

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#1014MediumFrequency: 82%

K Closest Points to Origin

Array Math Divide and Conquer Geometry Sorting Heap (Priority Queue)Quickselect

#11

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#273HardFrequency: 82%

Integer to English Words

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Math String Recursion

#12

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#70EasyFrequency: 79%

Climbing Stairs

Asked at Microsoft

Math Dynamic Programming Memoization

#13

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#380MediumFrequency: 79%

Insert Delete GetRandom O(1)

Asked at Oracle

Array Hash Table Math Design Randomized

#14

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#166MediumFrequency: 79%

Fraction to Recurring Decimal

Asked at Databricks

Hash Table Math String

#15

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#356MediumFrequency: 77%

Line Reflection

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Array Hash Table Math

#16

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#66EasyFrequency: 76%

Plus One

Array Math Heap (Priority Queue)Simulation

Array Math

#17

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#3555EasyFrequency: 76%

Final Array State After K Multiplication Operations I

Asked at Databricks

#18

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#1585MediumFrequency: 73%

The kth Factor of n

Asked at TikTok

Math Number Theory

#19

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#9EasyFrequency: 73%

Palindrome Number

Asked at PayPal

Math

#20

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#381HardFrequency: 72%

Insert Delete GetRandom O(1) - Duplicates allowed

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Array Hash Table Math Design Randomized

#21

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#69EasyFrequency: 71%

Sqrt(x)

Math Binary Search

#22

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#62MediumFrequency: 68%

Unique Paths

Math Dynamic Programming Combinatorics

#23

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#12MediumFrequency: 63%

Integer to Roman

Asked at PayPal

Hash Table Math String

#24

Rank

#48MediumFrequency: 59%

Rotate Image

Array Hash Table Math Prefix Sum

Array Math Matrix

#25

Rank

#523MediumFrequency: 57%

Continuous Subarray Sum

Asked at TikTok

#26

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#224HardFrequency: 56%

Basic Calculator

Asked at Amazon

Math String Stack Recursion

#27

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#976MediumFrequency: 48%

Minimum Area Rectangle

Asked at Google

Array Hash Table Math Geometry Sorting

#28

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#13EasyFrequency: 44%

Roman to Integer

Hash Table Math String

#29

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#670MediumFrequency: 43%

Maximum Swap

Array Hash Table Math Binary Search Bit Manipulation Sorting

Math Greedy

#30

Rank

#268EasyFrequency: 42%

Missing Number

Asked at Google

#31

Rank

#282HardFrequency: 37%

Expression Add Operators