User Robin Andrews

6 votes

3 answers

123 views

Is it true that $\sum_{i=0}^{n-1} 2^i$ divides $\sum_{i=n}^{2n-1} 2^i$?

asked Jul 26, 2020 at 9:19

5 votes

3 answers

298 views

Parity Pattern of Triangle Numbers

asked Aug 13, 2022 at 8:51

4 votes

1 answer

93 views

Two meanings of modulo? [duplicate]

asked Oct 23, 2021 at 15:39

4 votes

1 answer

86 views

Composition of transpositions to solve a simple tile puzzle

asked Sep 11, 2020 at 12:48

4 votes

3 answers

175 views

Elementary Proof Relating to Pythagorean Triples

asked May 5, 2019 at 16:58

3 votes

2 answers

53 views

Proof of $2^n > n$ by Induction

asked Dec 12, 2018 at 9:42

3 votes

4 answers

111 views

Proving $3\mid p^3 \implies 3\mid p$

asked Mar 1, 2019 at 11:46

3 votes

2 answers

145 views

Topswaps Puzzle Termination Proof

asked Sep 8, 2021 at 14:11

3 votes

1 answer

109 views

Intuitive Understanding of Distributive Multiplication Property for Modulo

asked Oct 23, 2021 at 15:51

2 votes

3 answers

373 views

Understanding specific explanation of centre value of 3x3 magic square

asked Sep 24, 2022 at 8:54

2 votes

1 answer

488 views

Venn Diagram for Power Set

asked Sep 27, 2022 at 17:43

2 votes

2 answers

93 views

Understanding the "long division" notation used in Heath's commentary on Euclid Book 7 Proposition 2

asked Mar 29, 2022 at 21:31

2 votes

2 answers

277 views

Interpretation of Array notation for Permutations

asked Sep 18, 2020 at 8:25

2 votes

2 answers

829 views

Decomposing a permutation into 3-cycles

asked Nov 1, 2020 at 15:28

2 votes

5 answers

69 views

Intuitive understanding of maximum value of quadratic function

asked May 2, 2017 at 8:50

2 votes

2 answers

704 views

Integer Congruence Explanation

asked Apr 17, 2019 at 16:38

2 votes

5 answers

150 views

An integer $n > 7$ has form $r + 3k,\ r \in \{8,9,10\}\ $ [remainder systems]

asked Jun 28, 2019 at 18:10

2 votes

1 answer

87 views

3 of a kind, 5 rolls, 6-sized dice

asked Dec 14, 2019 at 18:50

2 votes

3 answers

383 views

Odd, Even combinations and Number of Integers for Each

asked Jun 17, 2020 at 14:16

1 vote

3 answers

171 views

Visualization for Euclidean Algorithm [duplicate]

asked Jul 5, 2020 at 17:43

1 vote

1 answer

329 views

Formula for probability of sums of rolling 2 six-sided dice

asked Dec 29, 2019 at 13:21

1 vote

2 answers

63 views

Steps to Simplify Boolean Expression

asked Jan 14, 2020 at 8:47

1 vote

1 answer

44 views

Feedback on elementary proof of evenness

asked Mar 22, 2019 at 19:48

1 vote

1 answer

226 views

Proving Set Identities - Why Do I Need Both Directions?

asked Dec 18, 2018 at 14:48

1 vote

1 answer

3k views

Venn Diagram tool to help with learning set theory

asked Dec 29, 2018 at 15:14

1 vote

2 answers

183 views

Proof that $2^{ab} - 1$ is divisible by $2^a - 1$

asked Aug 2, 2020 at 17:24

1 vote

3 answers

74 views

Visual Proof for Congruence Relation

asked Aug 16, 2020 at 21:39

1 vote

1 answer

71 views

Is it possible to swap tiles in 2x3 grid using rotations of 2x2 squares?

asked Aug 27, 2020 at 11:20

1 vote

0 answers

67 views

Position vs Value in Permutation Cycle Notation

asked Sep 12, 2020 at 20:26

1 vote

0 answers

131 views

Coin Flipping - Probability of Two Heads Given at Least one Head [duplicate]

asked Apr 10, 2021 at 10:42

Stack Exchange Network

53 Questions

Is it true that $\sum_{i=0}^{n-1} 2^i$ divides $\sum_{i=n}^{2n-1} 2^i$?

Parity Pattern of Triangle Numbers

Two meanings of modulo? [duplicate]

Composition of transpositions to solve a simple tile puzzle

Elementary Proof Relating to Pythagorean Triples

Proof of $2^n > n$ by Induction

Proving $3\mid p^3 \implies 3\mid p$

Topswaps Puzzle Termination Proof

Intuitive Understanding of Distributive Multiplication Property for Modulo

Understanding specific explanation of centre value of 3x3 magic square

Venn Diagram for Power Set

Understanding the "long division" notation used in Heath's commentary on Euclid Book 7 Proposition 2

Interpretation of Array notation for Permutations

Decomposing a permutation into 3-cycles

Intuitive understanding of maximum value of quadratic function

Integer Congruence Explanation

An integer $n > 7$ has form $r + 3k,\ r \in \{8,9,10\}\ $ [remainder systems]

3 of a kind, 5 rolls, 6-sized dice

Odd, Even combinations and Number of Integers for Each

Visualization for Euclidean Algorithm [duplicate]

Formula for probability of sums of rolling 2 six-sided dice

Steps to Simplify Boolean Expression

Feedback on elementary proof of evenness

Proving Set Identities - Why Do I Need Both Directions?

Venn Diagram tool to help with learning set theory

Proof that $2^{ab} - 1$ is divisible by $2^a - 1$

Visual Proof for Congruence Relation

Is it possible to swap tiles in 2x3 grid using rotations of 2x2 squares?

Position vs Value in Permutation Cycle Notation

Coin Flipping - Probability of Two Heads Given at Least one Head [duplicate]