Quantitative Trader Interview Questions

1,130 quantitative trader interview questions shared by candidates

Classic marble weighing problem, you have 12 marbles, one of which is different weight from the other 11 (but unknown whether it's heavier or lighter), and a two-sided balance, find the odd marble using at most 3 weighings (each weighing only reveals whether the two sides are balanced or if one side is heavier).
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Quantitative Trader

Interviewed at Cutler Group LLC

3.6
Nov 9, 2017

Classic marble weighing problem, you have 12 marbles, one of which is different weight from the other 11 (but unknown whether it's heavier or lighter), and a two-sided balance, find the odd marble using at most 3 weighings (each weighing only reveals whether the two sides are balanced or if one side is heavier).

A frog is traveling from point A(0,0) to point B(4,6) but each step can only be 1 unit up or 1 unit to the right. Additionally, the frog refuses to move three steps in the same direction consecutively. Compute the number of ways the frog can move from A to B.
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Quantitative Trader

Interviewed at Susquehanna International Group

3.8
Oct 19, 2025

A frog is traveling from point A(0,0) to point B(4,6) but each step can only be 1 unit up or 1 unit to the right. Additionally, the frog refuses to move three steps in the same direction consecutively. Compute the number of ways the frog can move from A to B.

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