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You and I are going to play a game where we alternate saying a number. The rules are that the starting person must say a number between 1 and 10, and then the next person can say any number that is between 1 and 10 higher than the previous number -- i.e., if I start and say 5, you can then say anything between 6 and 15. The goal of the game is for you to say the number 40. What is your strategy and why?
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Assistant Trader

Interviewed at Susquehanna International Group

3.8★
Nov 30, 2012

You and I are going to play a game where we alternate saying a number. The rules are that the starting person must say a number between 1 and 10, and then the next person can say any number that is between 1 and 10 higher than the previous number -- i.e., if I start and say 5, you can then say anything between 6 and 15. The goal of the game is for you to say the number 40. What is your strategy and why?

"You are a player in a basketball team.Your team loses with 2 points. You have the ball and the game ends in 3 seconds. You have 2 choices. Pass the ball for a 3 point shot or pass the ball for a 2 point shot. The 3 point shooter has 37% probability hitting the three (and winning the game) and the 2 point shooter has a probability of 77% probability hitting the 2 (and tie the game). In overtime there is 50-50% chance of winning/losing. What do you do and why?"
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Assistant Trader Internship

Interviewed at Susquehanna International Group

3.8★
Jan 11, 2017

"You are a player in a basketball team.Your team loses with 2 points. You have the ball and the game ends in 3 seconds. You have 2 choices. Pass the ball for a 3 point shot or pass the ball for a 2 point shot. The 3 point shooter has 37% probability hitting the three (and winning the game) and the 2 point shooter has a probability of 77% probability hitting the 2 (and tie the game). In overtime there is 50-50% chance of winning/losing. What do you do and why?"

2 ants are at the same point. One ant starts walking at a rate of 3 feet per minute for 4 minutes. 2 minutes in, the second ant start walking perpendicular to the first ant at a speed of 5 feet per minute and he walks for 1 minute. What is the rate of change of the distance between the two ants?
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Junior Trader

Interviewed at TransMarket Group

4.1★
Dec 20, 2014

2 ants are at the same point. One ant starts walking at a rate of 3 feet per minute for 4 minutes. 2 minutes in, the second ant start walking perpendicular to the first ant at a speed of 5 feet per minute and he walks for 1 minute. What is the rate of change of the distance between the two ants?

Eight quants from different banks are getting together for drinks. They are all interested in knowing the average salary of the group. Nevertheless, being cautious and humble individuals, everyone prefers not to disclose his or her own salary to the group. Can you come up with a strategy for the quants to calculate the average salary without knowing other people's salaries?
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Quantitative Trader

Interviewed at Jane Street

4.4★
Dec 3, 2022

Eight quants from different banks are getting together for drinks. They are all interested in knowing the average salary of the group. Nevertheless, being cautious and humble individuals, everyone prefers not to disclose his or her own salary to the group. Can you come up with a strategy for the quants to calculate the average salary without knowing other people's salaries?

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