# New post in Number-theory

July 26th, 2022

## What is countably infinite set?

January 15th, 2023

July 23rd, 2022

July 23rd, 2022

## pirates treasure divide problem

December 5th, 2022

## What's special properties does the number 1372 have?

November 27th, 2022

## why octal number system jumping from 7 to 10 instead 8?

August 15th, 2022

July 22nd, 2022

July 30th, 2022

August 1st, 2022

## How many natural numbers less than 1000 have the sum of their digits equal to 5? A.56 B.54 C.26 D.21 E.18

November 26th, 2020

August 1st, 2022

August 1st, 2022

## Prove there do not exist natural numbers m and n such that $7m^2 = n^2$.

October 22nd, 2020

## Proof that expression is integer

August 23rd, 2020

## How many positive integers $\le 1260$ are relatively prime to $1260$?

January 2nd, 2020

## Prove that if $2|(x^2-1)$, then $8|(x^2-1)$.

December 10th, 2020

August 1st, 2022

August 1st, 2022

August 1st, 2022

## An interesting problem in number theory

November 19th, 2020

August 1st, 2022

August 1st, 2022

August 1st, 2022

April 17th, 2020

July 17th, 2020

## Put N mices in nearest holes

September 28th, 2020

August 1st, 2022

August 1st, 2022

August 1st, 2022