Table of Contents
Which number is equal to sum of cubes of the digits of the number?
Problem Statement An Armstrong number of three digits is an integer such that the sum of the cubes of its digits is equal to the number itself. For example, 371 is an Armstrong number since 3**3 + 7**3 + 1**3 = 371.
How do you find the sum of a cube in Java?
sum = (n*(n+1)/2)2
- //Java Program to Find the Sum of n Cube Numbers.
- import java.io.BufferedReader;
- import java.io.InputStreamReader;
- public class SumOfNCubeNumbers {
- // Function to read n and display the sum.
- public static void main(String[] args) {
- BufferedReader br = new BufferedReader(new InputStreamReader(System.
How do you find the digits of a cube?
There is an easier method to find this than to find the whole cube root. Divide the digits into groups of 3 starting from the left. Since there are 3 groups that can be formed, therefore we know that the cube root will be having 3 digits.
What will be two square numbers whose sum names another square number?
Two square numbers are added together to make another square number. What are they? One possible answer is 16 + 9 which equals 25. Children in upper KS2 (but more usually KS3) will also learn about cube numbers.
What is the sum of the digits of a square number?
Sum of digits of a square number. A positive integer n is said to be good if there exists a perfect square whose sum of digits in base 10 is equal to n. For instance, 13 is good because (7^2)=49 and 4+9=13.
What is it called when you multiply a whole number?
Informally: When you multiply an integer (a “whole” number, positive, negative or zero) times itself, the resulting product is called a square number, or a perfect square or simply “a square.” So, 0, 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, and so on, are all square numbers.
Which is the best example of a square of a number?
Hence, area of square is best example of square of a number. Numbers such as 1, 4, 9, 16, 25, 36, 49, 64, etc. are special numbers as these are the product of a number by itself. If we express a number (x) in terms of the square of any natural number such as a 2, then x is a square number.
What is the last digit of a number in a square?
if the last digit of a number is 1 or 9, its square ends in 1; if the last digit of a number is 2 or 8, its square ends in 4; if the last digit of a number is 3 or 7, its square ends in 9; if the last digit of a number is 4 or 6, its square ends in 6; and