Trader Trainee Interview Questions

11,667 trader trainee interview questions shared by candidates

I give you 18 balls, of which 17 weigh the same and the last one is heavier than the rest. I also provide you a balance scale. Can you tell me the minimum number of weighs with which you can tell me which ball is the odd one?
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Trader Trainee

Interviewed at Belvedere Trading

4.2
Oct 24, 2011

I give you 18 balls, of which 17 weigh the same and the last one is heavier than the rest. I also provide you a balance scale. Can you tell me the minimum number of weighs with which you can tell me which ball is the odd one?

What is the expected value to you of the following game: You and another person have 3 coins each. You both flip all of your coins and if your three coins show the same number of tails as the other person, you pay them $2, otherwise they pay you $1.
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Trader

Interviewed at Susquehanna International Group

3.8
Mar 27, 2010

What is the expected value to you of the following game: You and another person have 3 coins each. You both flip all of your coins and if your three coins show the same number of tails as the other person, you pay them $2, otherwise they pay you $1.

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