User Benson Lin

12 votes

Why do some divisibility rules work only in base 10?

answered Oct 3, 2016 at 7:17

5 votes

Accepted

Solve this problem for a unit circle

answered Oct 5, 2016 at 15:53

5 votes

Lower bound for cyclic expression in four variables

answered Oct 6, 2016 at 14:05

4 votes

Finding the length of a triangle leg

answered Oct 3, 2016 at 13:34

4 votes

Accepted

General proof for combinatorics

answered Oct 29, 2016 at 2:11

3 votes

Accepted

Finding the number of combinations.

answered Jan 30, 2017 at 11:40

3 votes

Accepted

Counting the number of non-consecutive subsets of integers from $1$ to $n$.

answered Jan 30, 2017 at 16:54

3 votes

finding the number of bit string containing eight 0s and twelve 1s?

answered Oct 9, 2016 at 13:07

2 votes

Accepted

Allocating 100% over n objects

answered Oct 14, 2016 at 3:33

2 votes

How can I prove that $x^2=3y+2$ cannot have integer positive solutions?

answered Oct 6, 2016 at 13:51

2 votes

Accepted

Telling if a coord is inside a circle and forms part of a circumference

answered Oct 31, 2016 at 15:32

2 votes

A question of summation.

answered Jan 17, 2017 at 14:31

1 vote

A graph problem.

answered Dec 30, 2016 at 10:51

1 vote

Accepted

(Graph) - How to find number of vertices given number of edges and some information on the degrees of vertices?

answered Jan 31, 2017 at 6:04

1 vote

Graph Theory - Degree of vertices proof

answered Jan 30, 2017 at 13:33

1 vote

If $n > 1$ is an integer not of the form $6k + 3$, prove that $n^{2} + 2^{n}$ is composite.

answered Oct 19, 2016 at 6:42

1 vote

Accepted

In a circle, $\ O$ is the centre....

answered Oct 16, 2016 at 6:28

1 vote

Old childhood game

answered Oct 10, 2016 at 13:29

1 vote

Prove that if 3 circles are tangent to one another then the tangents at the points of contact are concurrent.

answered Oct 4, 2016 at 7:03

1 vote

Accepted

Divisibility Biconditional Proof

answered Oct 4, 2016 at 13:48

1 vote

Accepted

Ratio to be proved constant

answered Oct 9, 2016 at 11:52

0 votes

Accepted

child nodes of a incomplete binary tree

answered Oct 6, 2016 at 8:14

0 votes

Combination with Repetition: 100 bikes, 4 warehouses question

answered Oct 4, 2016 at 14:57

0 votes

Accepted

Finding arc length of a circle from co-ordinate points

answered Oct 10, 2016 at 14:39

0 votes

Question about how they get forms in proof of "The square of any odd int has the form 8m+1 for some int m"

answered Oct 13, 2016 at 6:24

0 votes

Accepted

Graph Theory question: finding the number of vertices from number of edges?

answered Oct 18, 2016 at 3:28

0 votes

Algorithm to determine longest increasing subsequence of a permutation

answered Jan 1, 2017 at 13:50

0 votes

Find the area of a parallelogram

answered Jan 29, 2017 at 14:42

0 votes

If $x$ is a real and $0 < x < 4$, then $\frac{4}{x(4-x)} \geq 1$

answered Nov 7, 2016 at 15:26

0 votes

Sigma Notation.

answered Nov 9, 2016 at 10:31

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30 Answers

Why do some divisibility rules work only in base 10?

Solve this problem for a unit circle

Lower bound for cyclic expression in four variables

Finding the length of a triangle leg

General proof for combinatorics

Finding the number of combinations.

Counting the number of non-consecutive subsets of integers from $1$ to $n$.

finding the number of bit string containing eight 0s and twelve 1s?

Allocating 100% over n objects

How can I prove that $x^2=3y+2$ cannot have integer positive solutions?

Telling if a coord is inside a circle and forms part of a circumference

A question of summation.

A graph problem.

(Graph) - How to find number of vertices given number of edges and some information on the degrees of vertices?

Graph Theory - Degree of vertices proof

If $n > 1$ is an integer not of the form $6k + 3$, prove that $n^{2} + 2^{n}$ is composite.

In a circle, $\ O$ is the centre....

Old childhood game

Prove that if 3 circles are tangent to one another then the tangents at the points of contact are concurrent.

Divisibility Biconditional Proof

Ratio to be proved constant

child nodes of a incomplete binary tree

Combination with Repetition: 100 bikes, 4 warehouses question

Finding arc length of a circle from co-ordinate points

Question about how they get forms in proof of "The square of any odd int has the form 8m+1 for some int m"

Graph Theory question: finding the number of vertices from number of edges?

Algorithm to determine longest increasing subsequence of a permutation

Find the area of a parallelogram

If $x$ is a real and $0 < x < 4$, then $\frac{4}{x(4-x)} \geq 1$

Sigma Notation.