Help me in solving CHEARMY problem

help
,
1

My issue

How the intution of base5 will come, i didnt understand how it helps how it is making equal to 5 will solve problem please explain.

My code

/* package codechef; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Codechef
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		Scanner s = new Scanner(System.in); 
		int t = s.nextInt();
		
		for(int i = 0 ; i< t ; i++){
		    int magical=s.nextInt();
		    int magic = 0 ; 
		    int n = 0 ; 
		    while(true){
		  
		    int c = 0 ; 
		    int temp=n;
		    while(n>0){
		        
		        int x = n%10 ; 
		        if(x%2 != 0){
		            c+=1  ; 
		        }
		        n = n/10 ; 
		    }
		    
		    if(c==0){
		       magic+=1 ; 
		    }
		    if(magic == magical ){
		        System.out.println(temp);
		        break ;
		    }
		    n=temp+1;
		    }
		}
		
	}
}

Learning course: 1600 to 1800 difficulty problems
Problem Link: Chef And The Hiring Event Practice Problem in - CodeChef