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Marconius
  • Member for 7 years, 2 months
  • Last seen more than 6 years ago
  • Johannesburg, South Africa
13 votes

How to solve $\ x^2-19\lfloor x\rfloor+88=0 $

11 votes
Accepted

What is the maximum number of points of intersection of 8 circles?

9 votes

Surprising identities / equations

7 votes

Construct an example of a function with period 1 which is not a trig function and is differentiable at every point.

7 votes

How to construct the point of intersection of a line and a parabola whose focus and directrix are known?

6 votes

Finding $(a, b, c)$ with $ab-c$, $bc-a$, and $ca-b$ being powers of $2$

6 votes
Accepted

Find the sum of the roots of the floor equation

6 votes
Accepted

Compute $\lim_{x \to 0} x \lfloor x - \frac{1}{x} \rfloor$

6 votes

Tile a 1 x n walkway with 4 different types of tiles...

5 votes

Find the solution of $\lfloor{x^2}\rfloor−\lfloor{3x}\rfloor+2=0$

5 votes

Checking logarithm inequality.

4 votes

Eliminate $t$ to give an equation that relates $x$ and $y$

4 votes
Accepted

How to change a $9\times 16$ rectangle to $12\times 12$ square?

4 votes
Accepted

Proof by contradiction problem

4 votes

The position of a ladder leaning against a wall and touching a box under it

4 votes
Accepted

Probability doubles if you switch cards when the third card is revealed, How?

4 votes
Accepted

28 soldiers puzzle

3 votes

Are there any solution for a,b,c,d such that $(a+bi)^{n}+(c+di)^{n}=2i$

3 votes

Probability - consecutive numbers

3 votes
Accepted

Each number in a subset $S\subseteq \{1,\ldots,2n\}$ does not divide another one. Then $\max |S|$?

3 votes
Accepted

What is the radius of smallest circular disk large enough to cover every acute isosceles triangle of a given perimeter $L$?

3 votes
Accepted

if $a_{1},a_{2},a_{3},a_{4}$ be rational numbers then find $a_{1}+a_{2}+a_{3}+a_{4}$

3 votes
Accepted

While resolving a continued fraction by simplifying it into a quadratic equation, does the extraneous root have any significance?

3 votes

possible polyhedra from euler's formula

3 votes

Puzzle on the triangle.

3 votes
Accepted

Coefficient of $x^9$ in $(1+x)\cdot (1+x^2)\cdot (1+x^3)\cdots(1+x^9)$

3 votes
Accepted

Factoring Quadratic equation

3 votes

Express the polynomial $x^3-4x-4$ as a linear combination of $x-2$, $(x-2)^2$ and $(x-2)^3$

3 votes

$n$-th term of an infinite sequence

3 votes
Accepted

How to reverse the order of integration

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