# Welcome to GanitCharcha's Publication House

## A Note on Factorial and it's Trailing Zeros

DefinitionFor any positive integer $n (>0)$ the factorial of $n$, denoted as $n!$, is defined as\begin{align}n! =...

## Generalization of Divisibility Rules for Primes

For any prime $p$ other than $2$ and $5$ first find out some $x$ such that $px = 10y + 1,$ where $x$ and $y$ are both integers. In number theory, Bezout's...

## A Brief Introduction of Number System

We provide in this note a brief account of our number system. Idea is to introduce different types of numbers and to discuss a few relevant concepts associated...