OQG Trivia

Brain Teasers

100

If a quantity grows by 10% twice, is the total growth more or less than 20%?

More; 21%

200

How many handshakes occur if 20 people shake hands once each?

20C2 = 190 handshakes

300

What is the probability of drawing two aces without replacement?

4/52 * 3/51 = 1/221

400

How many ways can 5 people sit around a round table?

(5 - 1)! = 4! = 24

500

An ant sit on the corner of a tetrahedron (4 sides). It's home is on another corner. It would like to walk home but it is drunk and moves randomly. How many sides will it walk before it gets home?

E₀ = ( 2E₀ + E₁ ) / 3 + 1

E₁ = 0

E₀ = 2/3E₀ + 1 => 3

CS/DSCI

100

What's the difference between a stack and queue?

LIFO vs. FIFO

200

What Python structure keeps data in key-value pairs?

Dictionary

300

What is recursion?

Self-calling function with base case

400

What does regularization prevent?

overfitting

500

What is a confusion matrix?

classifier performance (T/F positives/negatives)

Finance/Econ

100

What does "real" mean in real interest rates?

Adjusted for inflation

200

What does price elasticity measure?

Responsiveness to price

300

What are 2 ways to reduce financial risk?

Diversification, Risk Transfer (insurance), Mitigation/Reduction (emergency funds)

400

If you invest $100 into an asset that yields 10% a year, how much will you have in 10 years?

1.1^10 * 100 = ~$259

500

What assumption underlies efficient market theory?

Information is reflected in prices

Mathematics

100

What is the sum of interior angles of a triangle?

180˚

200

log₂8192

13

300

What is the sum of interior angles of a pentagon?

540

400

How can you compute variance from standard deviation?

Var = StdDev^2

500

Sum from 1 to n?

n(n+1)/2