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Duncan
  • Member for 8 years, 1 month
  • Last seen more than 3 years ago
28 votes

'Obvious' theorems that are actually false

5 votes

Combinations: How many handshakes?

3 votes

Turn a power of $2$ into a multiple of $7$, maybe adding a $2$ but not a $7$

3 votes

Euclid the Game Level 2: Construct a line that bisects the given angle.

2 votes
Accepted

Prove this inequality: If $|x+3|< 0.5$, show that $|4x+13| < 3$

2 votes

A fair six sided die is rolled $5$ times. What is the probability that a perfect square will appear exactly twice?

2 votes

How can one pass from "almost surely" to "surely"?

2 votes
Accepted

Why does not hold the equality,but the inequality?

2 votes
Accepted

What is a bounded discrete random variable

2 votes
Accepted

Why choosing Linear Regression?

2 votes

Distribution of minimum of independent normal variables

2 votes

Standard deviation of two data sets

2 votes
Accepted

Concerning the point $(7,a)$ on the line containing $(0,0)$ and $(4,2)$

2 votes
Accepted

Basic Combinatorics Choices Question

1 vote
Accepted

Probability that the FIFA has to draw lots to determine the winner of a group at the 2014 World Cup

1 vote
Accepted

Probability: A variant of the Monty Hall Problem

1 vote

Does "Expected Absolute Deviation" or "Expected Absolute Deviation Range" exist in stats and have another name?

1 vote

Is it random and representative of all Australians if 200 people are interviewed from the the Sydney area Phone book?

1 vote

Prove using a proof sequence and justify each step

1 vote
Accepted

A simple question about permutations

1 vote

Conditional Probability matching socks

1 vote

Tossing a coin. X is the number tosses. What is the probability that X is an odd number?

1 vote

Moments at which moving points on a circle coincide

1 vote

Permutations Discrete Math

1 vote

what does tangent mean?

1 vote

How to prove $k!+(2k)!+\cdots+(nk)!$ has a prime divisor greater than $k!$

1 vote
Accepted

Confused by Probability Notation and Solution

0 votes

Soft question about the square root

0 votes

Closed Sets and Open Sets

0 votes

An ice cream cone is 8 inches tall and