Question

Are there any formulas or rules that utilize the digits of a number?

score 69 · Answer 1 · 2020-06-16 18:45:00

69

Views

Are there any formulas or rules that utilize the digits of a number?

Published on 16 Jun 2020 - 18:45

score 29 · Answer 2 · 2020-06-17 08:48:34

29

Views

The less period of "1/b"

Published on 17 Jun 2020 - 8:48

score 60 · Answer 3 · 2026-03-26 17:34:57

60

Views

Prove that $+:\mathbb{N} \times \mathbb{N} \to \mathbb{N}$ is a binary operation

Published on 26 Mar 2026 - 17:34

score 51 · Answer 4 · 2020-06-18 12:56:42

51

Views

Use the notion of Integers to find a solution for $a+x=b$, $a,b,x \in \mathbb{N}$.

Published on 18 Jun 2020 - 12:56

score 368 · Answer 5 · 2020-06-19 20:28:26

368

Views

Show $\frac{(m+2n)^2}{(m+n)^2} -2 \lt 2- \frac{m^2}{n^2}$, where $m$ and $n$ are natural numbers.

Published on 19 Jun 2020 - 20:28

score 672 · Answer 6 · 2020-06-23 11:39:10

672

Views

"Proof" of $0=1$ in set theory

Published on 23 Jun 2020 - 11:39

score 206 · Answer 7 · 2020-06-23 17:17:45

206

Views

How to recursively define a sum of any finite sequence

Published on 23 Jun 2020 - 17:17

score 40 · Answer 8 · 2020-06-24 00:03:06

40

Views

For all $a,b,n \in \mathbb N$, $0 \leq n(a+b+1)-n^2 +b$

Published on 24 Jun 2020 - 0:03

score 19 · Answer 9 · 2026-03-25 15:57:00

19

Views

difference between sampling from different number system

Published on 25 Mar 2026 - 15:57

score 552 · Answer 10 · 2026-03-27 23:36:59

552

Views

How do we know that the number $1$ is not equal to the number $-1$?

Published on 27 Mar 2026 - 23:36

score 67 · Answer 11 · 2026-03-27 00:58:03

67

Views

Is there a rule system on which all rule systems can be underpinned?

Published on 27 Mar 2026 - 0:58

score 880 · Answer 12 · 2020-07-05 03:22:42

880

Views

How to prove that Von Neumann's set of natural numbers only contains 0 and it's successors?

Published on 05 Jul 2020 - 3:22

score 84 · Answer 13 · 2020-07-06 09:24:00

84

Views

Show that: The set of all finite subsets of $\mathbb{N}$ is a countable set

Published on 06 Jul 2020 - 9:24

score 31 · Answer 14 · 2020-07-06 19:06:46

31

Views

Solving a system of equations, based on a gear, such that solutions are natural numbers or proving no solution exists.

Published on 06 Jul 2020 - 19:06

score 228 · Answer 15 · 2026-03-28 04:42:15

228

Views

Without the ZF axiom of regularity can any infinite sets be constructed?

Published on 28 Mar 2026 - 4:42

List Question

Are there any formulas or rules that utilize the digits of a number?

The less period of "1/b"

Prove that $+:\mathbb{N} \times \mathbb{N} \to \mathbb{N}$ is a binary operation

Use the notion of Integers to find a solution for $a+x=b$, $a,b,x \in \mathbb{N}$.

Show $\frac{(m+2n)^2}{(m+n)^2} -2 \lt 2- \frac{m^2}{n^2}$, where $m$ and $n$ are natural numbers.

"Proof" of $0=1$ in set theory

How to recursively define a sum of any finite sequence

For all $a,b,n \in \mathbb N$, $0 \leq n(a+b+1)-n^2 +b$

difference between sampling from different number system

How do we know that the number $1$ is not equal to the number $-1$?

Is there a rule system on which all rule systems can be underpinned?

How to prove that Von Neumann's set of natural numbers only contains 0 and it's successors?

Show that: The set of all finite subsets of $\mathbb{N}$ is a countable set

Solving a system of equations, based on a gear, such that solutions are natural numbers or proving no solution exists.

Without the ZF axiom of regularity can any infinite sets be constructed?

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