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2h
revised Formula for finding integer solutions to Ax=b?
format matrices
1d
comment What is the significance of using prime numbers in proving: $x$ is a multiply of $y$?
You don't mean $(n-1)(n-2)$, you mean $(n-1)(n+1)$.
2d
comment How to solve this riddle mathematically?
This answers the question of “what question would you ask” but not “How to solve this riddle mathematically”.
Feb
10
comment Why is “$\pi^2= g $” where $g$ is the gravitational constant?
Coincidence. The second was defined to be $\frac1{86400}$ part of a solar day long before the pendulum definition, which was first mooted in the 17th century. Later definitions using the pendulum were made so that the new definition matched the old one. And although Wilkins suggested defining a unit of length which was coincidentally very close to the definition of the modern meter, his definition, using the pendulum, wasn't adopted and in fact predated the actual definition of the meter by 130 years. (I am the author of the post about John Wilkins that is cited in the link you gave.)
Feb
10
revised What are some surprising appearances of $e$?
deleted 23 characters in body
Feb
10
comment What are some surprising appearances of $e$?
Consider one particular bin. Each ball falls into some other bin with probability $1-\frac1N$. The probability of all balls falling into some other bin is then $\left(1-\frac1N\right)^N$.
Feb
10
revised What are some surprising appearances of $e$?
added 31 characters in body
Feb
10
answered What are some surprising appearances of $e$?
Feb
8
revised Compact sets in the product of topological spaces.
edited title
Feb
8
revised What is the similarity between the numbers $85, 19,17, 4$ and $2$?
edited tags
Feb
8
comment What is the similarity between the numbers $85, 19,17, 4$ and $2$?
None of them is equal to 48.
Feb
7
revised Probability of island having 8 people born with disease, estimate?
edited tags
Feb
7
revised $p(X)$, $P(Y)$, $p(Z) > 0$ and every pair of these events is independent, then $p(X \wedge Y \wedge Z) > 0$?
edited tags
Feb
5
answered Is $0$ a natural number?
Feb
3
comment Why every fundamental group isn't a trivial fundamental group?
@Trevor Topologists also use the term “torus” for any product of one or more circles $S^1\times S^1\times\dots \times S^1$. This includes $S^1$ itself as well as the standard 2-torus $S^1\times S^1$.
Feb
3
comment Book on foundational reasoning of standard arithmetics “curriculum”
That's “Bertrand Russell”.
Feb
3
revised An obvious pattern to $i\uparrow\uparrow n$ that is eluding us all?
edited tags
Feb
3
comment How to find $x$ when $2^{x}+3^{x}=6$?
What does “stiff” mean?
Feb
1
awarded  Favorite Question
Feb
1
comment What is the denial of a statement in logic math?
Any sentence can be negated by appending “It is not the case that” to the beginning. For example, the negation of “Some people are honest and some people are not honest” is “It is not the case that some people are honest and some people are not honest.”