 WorldQuant

## Questions d'entretien

Entretien pour Quantitative Researcher

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# What are the last 4 digits of 2015^(2013^2014]? The three distinct entries of a 2 x 2 symmetric matrix are drawn from the uniform distribution [-60, 60]. What is the expected determinant of the matrix? How many times a day do the hour and minute hands of an analog clock form a right angle? If WHITE=000, RED-101, BLUE-110, and PURPLE-100, then what three-digit string corresponds to YELLOW? There are 4 green and 50 red apples in a basket. They are removed one-by-one, without replacement, until all 4 green ones are extracted. What is the expected number of apples that will be left in the basket? Given two assets that have expected excess returns of 7 and 4, and given their expected covariance matrix: {1,1}{1,2} What is the maximum expected Sharpe ratio that you can achieve by combining the two assets into a portfolio? Consider a polynomial f(x) and its derivative f (x) that are related according to: f(X) - f‘(X) = X"3 + 3*X"2 + 3*X + 1 What is f(9)? A pedestrian starts walking from town A to town B. At the same time, another pedestrian starts walking from town B to town A. They pass each other at noon and continue on their paths. One of them arrives at 4 PM, the other at 9 PM. How many hours had each walked before passing each other? Seven people are in an argument, but potentially some or all of them are liars. They give the following statements: Bob: "No one lies." Jennifer: "No one tells the truth." Conrad.: "Jennifer is not a liar." Tom: "Conrad and Sherry always lie at the same time." Sherry: "Danny never lies." Danny: "Sherry is a liar." Adam: "Danny sometimes lies.” How many of them are lying? A city is composed of three parallel east-west streets and four parallel north-south streets: Note there are 12 intersections and 17 street segments. A policeman needs to visit every street segment, but he wants to take the shortest path. The policeman can start at any intersection, and he can only traverse streets, going from one intersection to another. How many street segments are there in the shortest path that visits each street segment at least once? Three riflemen A, B, and C take turns shooting at a target. The first rifleman to hit the target gets 2002 dollars. A shoots first, B second, and C third, after which the cycle repeats again with A, until one of the riflemen hits the target. Each hits the target with probability 0.5. What is rifleman A's expected winnings in dollars? Nine boys and seven girls are seated randomly around a circular table with 16 seats. Find the expected number of girl-boy neighbors. For example, in the seating below there are four such pairs. GBBBBB G B G B GGGBBG

## Réponses aux questions d'entretien

11 réponse(s)

6

Max le

2

Yellow = 001 it`s my calculation but i`ve also found the same answer in one chinese forum

Max le

1

E = sum(k=1, 50) (53-k)(52-k)(51-k)x4xk/(54x53x52x51) = 10

tranminhhai le

6

What are the last 4 digits of 2015^(2013^2014) ? 9375

Zeno le

2

What are the last 4 digits of 2015^(2013^2014) ? 2014^2014 Is even so the last 4 digits are 0625

Greg le

3

hh

Utilisateur anonyme le

0

E =( C(3,52)x1 + C(3,51)x2 + ... + C(3,3)x50 )/C(4,54) (not sure)

tranminhhai le

0

10 red apples my previous one is wrong! sorry

tranminhhai le

0

0 - vowel pronounced 1 - consonant pronounced Taking in account only the first 3 sounds: Yellow = 001

Ves le

0

f(9) = 1000

tranminhhai le

0

2015^5=33218135507009400 So the last 4 digits of 2015^(greater than 5) is 0000.

Ves le

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