Problem database last updated: June 20, 2025
5 problems · 0 Easy, 5 Medium, 0 Hard · Ranked #228 of 458
0 Easy
0% · avg 23%
5 Medium
100% · avg 59%
0 Hard
0% · avg 18%
Based on 5 reported problems, Trexquant interviews are easier than average - only 0% Hard compared to 18% across all companies. The majority (100%) of questions are Medium difficulty, which is typical for companies that want to see solid fundamentals without excessive trick questions.
Compared to the industry average, Trexquant puts unusual emphasis on hash-table (40% of problems, 1.8x the industry average). If you're short on time, these are the categories to double down on.
The most common topics are array (60%), hash-table (40%), math (20%), greedy (20%). Problems below are sorted by frequency, the ones at the top are asked most often.
| Problem | Difficulty | Frequency | Topics | |
|---|---|---|---|---|
Max Difference You Can Get From Changing an Integer You are given an integer num. You will apply the following steps to num two separate times: | Medium | Very Likely | mathgreedy | Solve |
Spiral Matrix Given an m x n matrix, return all elements of the matrix in spiral order. | Medium | Very Likely | arraymatrixsimulation | Solve |
3Sum Given an integer array nums, return all the triplets [nums[i], nums[j], nums[k]] such that i != j, i != k, and j != k, and nums[i] + nums[j] + nums[k] == 0. | Medium | Very Likely | arraytwo-pointerssorting | Solve |
Letter Combinations of a Phone Number Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. Return the answer in any order. | Medium | Very Likely | hash-tablestringbacktracking | Solve |
Brick Wall There is a rectangular brick wall in front of you with n rows of bricks. The ith row has some number of bricks each of the same height (i.e., one unit) but they... | Medium | Very Likely | arrayhash-table | Solve |
Max Difference You Can Get From Changing an Integer
SolveYou are given an integer num. You will apply the following steps to num two separate times:
Spiral Matrix
SolveGiven an m x n matrix, return all elements of the matrix in spiral order.
3Sum
SolveGiven an integer array nums, return all the triplets [nums[i], nums[j], nums[k]] such that i != j, i != k, and j != k, and nums[i] + nums[j] + nums[k] == 0.
Letter Combinations of a Phone Number
SolveGiven a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. Return the answer in any order.
Brick Wall
SolveThere is a rectangular brick wall in front of you with n rows of bricks. The ith row has some number of bricks each of the same height (i.e., one unit) but they...
Frequency scores are based on crowdsourced interview reports. A higher score means the problem has been reported more often in recent Trexquant interviews.
Very Likely
75-100%
Likely
50-74%
Sometimes
25-49%
Rare
0-24%
Trexquant interviews focus heavily on array, hash-table, math problems. If you're short on time, these are the categories to prioritize. The problems on this page are sorted by frequency, so start from the top and work your way down.
Beyond solving problems, practice explaining your approach. Trexquant interviewers care about your thought process - how you break down a problem, consider edge cases, and evaluate tradeoffs between solutions. A clean O(n) solution you can explain clearly beats an O(log n) solution you can't articulate.
Looking for more companies? Browse all 458 companies in our directory, or sharpen your fundamentals with our free data structure visualizers and AI-powered DSA tutor.
Trexquant has been reported to ask 5 distinct coding problems. The most common topics are array, hash-table, math. 0 are Easy difficulty, 5 are Medium, and 0 are Hard. Problems are sorted by frequency - the ones at the top are asked most often.
Based on 5 reported problems, Trexquant interviews are easier than average - only 0% Hard compared to 18% across all companies. 100% of questions are Medium difficulty. Focus on the high-frequency Medium problems first, then work through the Hard ones.
Start with the highest-frequency problems listed on this page. Focus on the core topics: array, hash-table, math. Practice solving them under time pressure and explaining your approach out loud. Mock interviews with AI can simulate the real experience.
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