Quant Analyst Interview Questions

2,926 quant analyst interview questions shared by candidates

You play a 100-round game: each round you can either roll a fair 20-sided die (uniform 1 to 20) or “lock in” the current face and collect that same reward for all remaining rounds. You must roll in the first round. What is your optimal stopping / locking strategy and expected value?
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Quant Trading Intern

Interviewed at Jane Street

4.4
Sep 30, 2025

You play a 100-round game: each round you can either roll a fair 20-sided die (uniform 1 to 20) or “lock in” the current face and collect that same reward for all remaining rounds. You must roll in the first round. What is your optimal stopping / locking strategy and expected value?

You are playing a game where you flip a coin 5 times. You win if three heads come up in the 5 coin tosses. You lose if three tails come up in the 5 coin tosses. If you win you get £1. If you lose you lose £1. Before each flip you can choose to either double the stakes from their previous value (if you win you get £2n and if you lose you lose £2n where n is the amount you get if you win beforehand) or keep them the same. Are you willing to pay £0.50 to play this game?
avatar

Quant Trading Internship

Interviewed at Jane Street

4.4
Oct 2, 2025

You are playing a game where you flip a coin 5 times. You win if three heads come up in the 5 coin tosses. You lose if three tails come up in the 5 coin tosses. If you win you get £1. If you lose you lose £1. Before each flip you can choose to either double the stakes from their previous value (if you win you get £2n and if you lose you lose £2n where n is the amount you get if you win beforehand) or keep them the same. Are you willing to pay £0.50 to play this game?

About myself, asked about a project on my CV. Standard stats questions, expected them to be hard, they were medium difficulty for first round however actually doing them out loud and explaining thought process was nerve racking and hard to focus.
avatar

Quant Trader Intern

Interviewed at Jane Street

4.4
Nov 11, 2025

About myself, asked about a project on my CV. Standard stats questions, expected them to be hard, they were medium difficulty for first round however actually doing them out loud and explaining thought process was nerve racking and hard to focus.

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