Numbers Archives - GeeksforGeeks

Numbers - Aptitude Questions and Answers

Last Updated: 22 April 2025

Numbers are the fundamental units of mathematics. In this article, we will discuss numbers, their types, important facts, divisibility rules...read more

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Roman Numerals 1 to 100 | Roman Numbers Chart, Rules & Examples

Last Updated: 05 April 2025

Roman numerals are a numerical notation system that originated in ancient Rome. The Roman number system uses seven symbols, each with a fixe...read more

Python Program to Convert Decimal to Hexadecimal

Last Updated: 16 December 2023

In this article, we will learn how to convert a decimal value(base 10) to a hexadecimal value (base 16) in Python. Method 1: Using hex() fu ...read more

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Convert string to integer without using any in-built functions

Last Updated: 13 December 2023

Given a string str, the task is to convert the given string into the number without using any inbuilt function.Examples:Input: str = "985632 ...read more

How to store a very large number of more than 100 digits in C++

Last Updated: 13 December 2023

Given an integer N in form of string str consisting of more than 100 digits, the task is to store the value for performing an arithmetic ope ...read more

BCD or Binary Coded Decimal

Last Updated: 27 March 2025

Binary Coded Decimal (BCD) is a binary encoding system in which each decimal digit is represented by a fixed number of binary bits, typicall ...read more

Program to find absolute value of a given number

Last Updated: 13 December 2023

Given an integer N, The task is to find the absolute value of the given integer.Examples:Input: N = -6Output: 6Explanation: The absolute val ...read more

Largest and smallest digit of a number

Last Updated: 13 December 2023

Given a number N. The task is to find the largest and the smallest digit of the number.Examples :Input : N = 2346Output : 6 26 is the larges ...read more

Find the Number which contain the digit d

Last Updated: 13 December 2023

Given two integer number n and d. The task is to find the number between 0 to n which contain the specific digit d.Examples:Input : n = 20 ...read more

Last Updated: 08 April 2025

Numbers are symbols we use to count, measure, and describe things. They are everywhere in our daily lives and help us understand and organiz...read more

Find all factors of a Natural Number in sorted order

Last Updated: 22 July 2024

Given a natural number n, print all distinct divisors of it.Examples: Input : n = 10 Output: 1 2 5 10 Input: n = 100 Output: 1 2 4 5 ...read more

Find all factors of a Natural Number

Last Updated: 18 February 2025

Given a natural number n, print all distinct divisors of it.Examples:Input: n = 10 Output: 1 2 5 10Explanation: 1, 2, 5 and 10 are the...read more

Euler's Totient Function

Last Updated: 24 February 2025

Euler's Totient function Φ(n) for an input n is the count of numbers in {1, 2, 3, ..., n-1} that are relatively prime to n, i.e., the numbe...read more

Find the smallest number whose digits multiply to a given number n

Last Updated: 17 January 2022

Given a number 'n', find the smallest number 'p' such that if we multiply all digits of 'p', we get 'n'. The result 'p' should have minimum ...read more

Maximum and minimum of an array using minimum number of comparisons

Last Updated: 14 September 2024

Given an array of size N. The task is to find the maximum and the minimum element of the array using the minimum number of comparisons.Examp ...read more