Alfred

Quant Trading Interview Questions

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Hi all, I am looking for quant trading jobs. 
Can anyone share some of quant interview questions? 
 
Terminator

here some questions for reference



1. Find x if xxx... = 2

2. 3 points are randomly drawn on a circle. What is the probability of them being on the same semi-circle ?

3. A unit length is broken off into 3 pieces. What is the probability of them forming a triangle?

4. There are 14 identical-looking balls. 13 of them have the same weight while one of them is heavier than the rest. What is the minimum times you can weight to identify the heaviest ball ? How do you generalize for n balls ?

5. The hour and minute hands of a clock meet at 12'oclock. When will be the first time they meet again?

6. Calculate 2+2+2+2+\sqrt{2+\sqrt{2+\sqrt{2+\sqrt{2+\ldots}}}}


 
Gary Fung
Original Posted by - b'Terminator':

here some questions for reference



1. Find x if xxx... = 2

2. 3 points are randomly drawn on a circle. What is the probability of them being on the same semi-circle ?

3. A unit length is broken off into 3 pieces. What is the probability of them forming a triangle?

4. There are 14 identical-looking balls. 13 of them have the same weight while one of them is heavier than the rest. What is the minimum times you can weight to identify the heaviest ball ? How do you generalize for n balls ?

5. The hour and minute hands of a clock meet at 12'oclock. When will be the first time they meet again?

6. Calculate 2+2+2+2+\sqrt{2+\sqrt{2+\sqrt{2+\sqrt{2+\ldots}}}}


How much time did you have to solve these questions? 
 
Nic C
Original Posted by - b'Terminator':

here some questions for reference



1. Find x if xxx... = 2

2. 3 points are randomly drawn on a circle. What is the probability of them being on the same semi-circle ?

3. A unit length is broken off into 3 pieces. What is the probability of them forming a triangle?

4. There are 14 identical-looking balls. 13 of them have the same weight while one of them is heavier than the rest. What is the minimum times you can weight to identify the heaviest ball ? How do you generalize for n balls ?

5. The hour and minute hands of a clock meet at 12'oclock. When will be the first time they meet again?

6. Calculate 2+2+2+2+\sqrt{2+\sqrt{2+\sqrt{2+\sqrt{2+\ldots}}}}


hey can you share the answers as well? 
  • I got x = sqrt(2) for question 1
  • and my answer for question 6 is 2  
is it correct? 


 
Nic C
Original Posted by - b'Gary Fung': How much time did you have to solve these questions? 
i think 20-30 min. That is 5 min each
 
⚡比卡超⚡
Original Posted by - b'Nic C':
hey can you share the answers as well? 
  • I got x = sqrt(2) for question 1
  • and my answer for question 6 is 2  
is it correct? 


yes i got the same answers
 
⚡比卡超⚡
Original Posted by - b'Terminator':

here some questions for reference



1. Find x if xxx... = 2

2. 3 points are randomly drawn on a circle. What is the probability of them being on the same semi-circle ?

3. A unit length is broken off into 3 pieces. What is the probability of them forming a triangle?

4. There are 14 identical-looking balls. 13 of them have the same weight while one of them is heavier than the rest. What is the minimum times you can weight to identify the heaviest ball ? How do you generalize for n balls ?

5. The hour and minute hands of a clock meet at 12'oclock. When will be the first time they meet again?

6. Calculate 2+2+2+2+\sqrt{2+\sqrt{2+\sqrt{2+\sqrt{2+\ldots}}}}


For question 5, i got t= 3927.2727...=1 hour 5 minutes 27.27 seconds 
 
Tobby Liu
Original Posted by - b'\xe2\x9a\xa1\xe6\xaf\x94\xe5\x8d\xa1\xe8\xb6\x85\xe2\x9a\xa1': For question 5, i got t= 3927.2727...=1 hour 5 minutes 27.27 seconds 
can you explain how to get this answer?
 
Jeremy
Original Posted by - b'Terminator':

here some questions for reference



1. Find x if xxx... = 2

2. 3 points are randomly drawn on a circle. What is the probability of them being on the same semi-circle ?

3. A unit length is broken off into 3 pieces. What is the probability of them forming a triangle?

4. There are 14 identical-looking balls. 13 of them have the same weight while one of them is heavier than the rest. What is the minimum times you can weight to identify the heaviest ball ? How do you generalize for n balls ?

5. The hour and minute hands of a clock meet at 12'oclock. When will be the first time they meet again?

6. Calculate 2+2+2+2+\sqrt{2+\sqrt{2+\sqrt{2+\sqrt{2+\ldots}}}}


Could you give the answers as well?
Do you have more interesting questions? 
 
Ivan