Quantitative Interview Questions

10,165 quantitative interview questions shared by candidates

Online exam consisted of 4 very basic probability/expected value questions. Selecting prime numbers and probabilities of their sum having a certain value, coin tossing games, optimal strategy in a black jack style coin problem. Phone interview consisted of a brain teaser where a system of linear equations were expected to form and solve, and a deck of card problems, and a game where you exhaust a deck of cards and get +1 or -1 dollars depending on the outcome and given rules, and you have to determine the expected p&l in this game.
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Quantitative Researcher

Interviewed at Jane Street

4.4
Aug 17, 2016

Online exam consisted of 4 very basic probability/expected value questions. Selecting prime numbers and probabilities of their sum having a certain value, coin tossing games, optimal strategy in a black jack style coin problem. Phone interview consisted of a brain teaser where a system of linear equations were expected to form and solve, and a deck of card problems, and a game where you exhaust a deck of cards and get +1 or -1 dollars depending on the outcome and given rules, and you have to determine the expected p&l in this game.

Given one hundred cards with numbers 1-100 on each card and two baskets. Throw each of these cards with 50% of probability falling in the left basket and 50% to the right. What is the expected value of the minimum number in the left basket.
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Quantitative Summer Intern

Interviewed at Jane Street

4.4
Feb 4, 2020

Given one hundred cards with numbers 1-100 on each card and two baskets. Throw each of these cards with 50% of probability falling in the left basket and 50% to the right. What is the expected value of the minimum number in the left basket.

Two symmetric dice have both had two of their sides painted red, two painted black, one painted yellow, and the other painted white. When this pair of dice is rolled, what is the probability that both dice land with the same color face up?
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Quantitative Trader

Interviewed at Jane Street

4.4
May 2, 2022

Two symmetric dice have both had two of their sides painted red, two painted black, one painted yellow, and the other painted white. When this pair of dice is rolled, what is the probability that both dice land with the same color face up?

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