User Will.Octagon.Gibson - Mathematics Stack Exchange

84 votes

What are some conjectures of your own?

answered Jun 7, 2023 at 20:13

18 votes

What are some obscure radical identities?

answered Aug 22, 2023 at 23:41

9 votes

Find the probability that the same boy does not receive both the pens.

answered Dec 23, 2024 at 8:32

9 votes

Accepted

Is finding the first derivative enough to check the existence of inflection points?

answered Mar 13 at 7:52

5 votes

Does rearranging a function change its domain?

answered Jan 19, 2024 at 22:35

4 votes

Accepted

Is it possible to solve an equation with two unknowns? (Only one equation is given)

answered Oct 7, 2023 at 20:32

4 votes

Measuring how "interesting" a sudoku grid is

answered Apr 7 at 7:24

4 votes

Tiling of a $9\times 7$ rectangle

answered Apr 17 at 4:36

4 votes

Combinatorics book recommendations for pure mathematics.

answered Aug 11, 2024 at 18:36

3 votes

How to get back to math and study abstract algebra?

answered Sep 9, 2024 at 7:09

3 votes

How to build a $6\times 6\times 6$ cube using 4-unit T-shaped pieces?

answered Apr 7, 2024 at 18:35

2 votes

If two pairs of numbers have equal sums and products, what can we conclude about the pairs?

answered Dec 13, 2023 at 20:33

2 votes

On the "solvability" of jigsaw Sudoku puzzles

answered Jan 3 at 6:49

2 votes

Could there exist a planar graph with the following degrees of vertices: {5, 5, 4, 4, 4, 2}

answered May 15, 2023 at 8:47

2 votes

Accepted

The sum of the two 7-digit numbers CARIBOU and CARIBOO is 3456789. What is C+A+R+I+B+O+U?

answered Dec 24, 2024 at 6:31

1 vote

Accepted

How many vertices can be in a graph if degree of each vertex is 7?

answered May 13, 2024 at 19:56

1 vote

Help With Basic TFL Problem

answered Jun 8, 2024 at 19:46

1 vote

Difficulty Grasping Shell Method; Volumes of Revolution Around Lines Other than the $X$ or $Y$ Axes

answered Sep 23, 2024 at 22:36

1 vote

Do there exist non-isomorphic graphs with same set of vertex degrees?

answered Nov 14, 2024 at 4:24

1 vote

Looking for books for trigonometric identities proofs

answered Jan 27 at 6:55

1 vote

Accepted

Reducing to 1 in fractions

answered Aug 11, 2022 at 8:38

1 vote

How to develop mathematical ingenuity besides practicing problems(advice for Cambridge STEP Exams)?

answered May 20, 2023 at 6:53

1 vote

Three grasshoppers jumping on a line

answered Jun 4, 2023 at 8:55

1 vote

The analogue of magazine "Quant"

answered Mar 18, 2024 at 20:09

1 vote

Maximum of $\frac{xy^2z}{x^4 - y^4 + z^4}$ with positive variables

answered Oct 26, 2023 at 21:32

0 votes

Solve functional equation: $f(x) + f(y) = f\left(\frac{x+y}{1-xy}\right) $

answered Jan 9, 2024 at 22:16

0 votes

Coloring 4 walls of a room with 4 colours such that no adjacent walls have same colours.

answered May 2, 2024 at 19:27

0 votes

Determine the number of $5$ digit numbers in which no digit occurs more than twice (numbers starting with $0$ are allowed).

answered Mar 10, 2024 at 19:46

0 votes

Infinite Set Probability from a Math Tweet

answered Jul 11, 2023 at 9:17

0 votes

Prove that $3n6n3^2+4n8n4^2$ yields a perfect square.

answered Dec 28, 2024 at 7:50

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31 Answers

What are some conjectures of your own?

What are some obscure radical identities?

Find the probability that the same boy does not receive both the pens.

Is finding the first derivative enough to check the existence of inflection points?

Does rearranging a function change its domain?

Is it possible to solve an equation with two unknowns? (Only one equation is given)

Measuring how "interesting" a sudoku grid is

Tiling of a $9\times 7$ rectangle

Combinatorics book recommendations for pure mathematics.

How to get back to math and study abstract algebra?

How to build a $6\times 6\times 6$ cube using 4-unit T-shaped pieces?

If two pairs of numbers have equal sums and products, what can we conclude about the pairs?

On the "solvability" of jigsaw Sudoku puzzles

Could there exist a planar graph with the following degrees of vertices: {5, 5, 4, 4, 4, 2}

The sum of the two 7-digit numbers CARIBOU and CARIBOO is 3456789. What is C+A+R+I+B+O+U?

How many vertices can be in a graph if degree of each vertex is 7?

Help With Basic TFL Problem

Difficulty Grasping Shell Method; Volumes of Revolution Around Lines Other than the $X$ or $Y$ Axes

Do there exist non-isomorphic graphs with same set of vertex degrees?

Looking for books for trigonometric identities proofs

Reducing to 1 in fractions

How to develop mathematical ingenuity besides practicing problems(advice for Cambridge STEP Exams)?

Three grasshoppers jumping on a line

The analogue of magazine "Quant"

Maximum of $\frac{xy^2z}{x^4 - y^4 + z^4}$ with positive variables

Solve functional equation: $f(x) + f(y) = f\left(\frac{x+y}{1-xy}\right) $

Coloring 4 walls of a room with 4 colours such that no adjacent walls have same colours.

Determine the number of $5$ digit numbers in which no digit occurs more than twice (numbers starting with $0$ are allowed).

Infinite Set Probability from a Math Tweet

Prove that $3n6n3^2+4n8n4^2$ yields a perfect square.