Question

A tech number has even number of digits. If the number is split in two equal halves, then the square of sum of these halves is equal to the number itself. Write a program to generate and print all four digit tech numbers. 

Example : 

Consider the number 3025 

Square of sum of the halves of 3025 = (30+25)_² 

= (55)_² 

= 3025 is a tech number.

Answer 1

import java.io.*; 

import java.util.*; 

class TechNumber 

{ 

public static void main(String args[ ]) 

{ 

int i, a, b, sum; 

String n; 

System.out.println(“Four Digits Tech Numbers are::”); 

for(i = 1000; i < 1000; i+ +) 

{ 

n = i +””; a = lnteger,parselnt(n.substring(0, 2)); 

b = Integer.parselnt(n.substring(2)); 

sum = (int)Math.pow((a + b), 2); if (sum == i) System.out.println(i); 

} 

} 

}