# Quantitative Researcher Interview Questions

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### Quantitative Researcher Summer Intern at Jane Street

Apr 17, 2011
 “3) Poker. 26 red, 26 black. Take one every time, you can choose to guess whether it’s red. You have only one chance. If you are right, you get 1 dollar. What’s the strategy? And what’s the expected…”

### Quantitative Researcher Summer Intern at Jane Street

Apr 17, 2011
 “2) A. 10 ropes, each one has one red end and one blue end. Each time, take out a red and a blue end, make them together. Repeat 10 times. The expectation of the number of loops.B. 10 ropes, no…”

### Quantitative Researcher at Jane Street

Dec 21, 2011
 “A tosses n+1 coins. B tosses n coins. B wins if he has at least as many heads as A. What is the probability that B wins?”
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### Quantitative Researcher Summer Intern at Jane Street

Apr 17, 2011
 “1) Tow coins, P(head)=1/3, P(tail)=2/3, design a way to get the effect of fair coin”

### Quantitative Researcher at Jane Street

May 22, 2013
 1 of 1 found helpful
 “If X, Y and Z are three random variables such that X and Y have a correlation of 0.9, and Y and Z have correlation of 0.8, what are the minimum and maximum correlation that X and Z can have?”

### Quantitative Research at Morgan Stanley

Jan 4, 2011
 “5 babies in a room, 2 boys and 3 girls. one baby with unknown sex is added. Randomly choose one baby and the result is a boy. What's the prob that the added baby is a boy?”

### Quantitative Research at J.P. Morgan

Feb 18, 2012
 “You play a game with someone, the rule is to take turns to put a quarter on a round table ( can be any size, but must be of symmetrical shape). You are trying to cover the table up with quarters, you…”

### Quantitative Researcher at TGS Management Company

Sep 15, 2012
 “How to generate a gaussian distribution with rand()”

### Quantitative Researcher at Jane Street

Oct 24, 2014
 “Interesting question:From a deck of 52 cards pick 26 at random. From this set of 26 you pick two cards. You win if the both of these cards are of the same color. Is this a game you would prefer…”

### Quantitative Researcher at Bracebridge Capital

Feb 25, 2010
 “I wasn't expecting any brain teaser questions.”
110 of 105 Interview Questions