Mental Math Probability/Statistics Math / Brain-Teaser Programming Finance/Trading
100
225
15*15
100
8
What is the expected value of a 15 sided die?
100
7
There are 25 horses. You get to race them 5 at a time , determining relative ranking. How many races does it take to figure out the top 3?
100
Queue
A ______ is generally described as a "first in, last out" data structure.
100
American
Unlike their European cousin, _______ options can be exercised at any time before maturity.
200
19979
20000 - 21
200
1/2

1/8 + 3/8 = 1/2
If you toss three coins, what is the probability of getting at least two heads?
200
1, 2, and 6
a, b, and c are all positive integers.

If a^2 + b^2 + c^2 = 41, what are a, b, and c?
200
ORDER BY `A` ASC
What clause in SQL would we use to sort a
query on column `A` in increase order?
200
Short (sell) 125 stock
If we buy 10 put options (1 option for 100 stock) with -25 delta each and 5 call options (1 option for 100 stock) with 75 delta each, what underlying position should we take to be delta neutral? (note - stocks have 100 delta)
300
279.6
23.3*12
300
3/10
If I roll a 10 sided die and you roll a 6 sided die, and whoever rolls the higher number wins, what is your probability of winning?
300
602

11^3 - 9^3
We have an 11x11x11 cube of 1x1 smaller cubes. How many cubes are exposed to the outside?
300
Thread
In computer science, a ______ of execution is the smallest sequence of programmed instructions that can be managed independently by a scheduler (typically as part of an operating system). Differs from a process in that ______s generally share memory.
300
Contango
_______ is a situation where the futures price (or forward price) of a commodity is higher than the expected spot price.
400
152
6^3 - 4^3
400
4.25

(1/2)(3.5)+(1/2)(5) = 4.25
What is the optimal expected value of a 6-sided dice roll if you have the option to re-roll?
400
2500
What is the sum of all odd numbers from 1 to 100?
400
O(n)

log(n) if using a binary heap
What is the big-O tight bound running time of insertion on a priority queue implemented using a heap?
400
(Call) backspread
What is the name of the spread with the given payoff graph at expiration,
where one holds more long positions than short positions?

Link
500
6375
2550 / 0.4
500
4.75
If we roll a die twice and take the larger number, what is the expected value?
500
6210000100
I'm thinking of a 10-digit number, where each digit represents the number of that ordinal number in the whole number. So, the first digit represents the number of 0's in the whole 10 digits, etc. What is the number?
500
Determines if the list has a loop.
What does the following algorithm do if the input "head" is the head of a linked list?

Link
500
Butterfly Spread
I am long 1 call with a low strike price,
short 2 calls with a middle strike price,
and long 1 call with a high strike price.

What kind of spread am I?






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