I thought it would be a little creative and easy, but NOOOOOOOOO...
Help me as I drown...

package com.codegym.task.task04.task0427;
/*
Describing numbers
*/
import java.io.*;
public class Solution {
public static void main(String[] args) throws Exception {
//write your code here
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String x1 = reader.readLine();
int x = Integer.parseInt(x1);
int digitCounter = 0;
while (x != 0){
x /= 10;
digitCounter++;
}
if(x % 2 == 0 && digitCounter == 1){
System.out.println("even single-digit number");
}else if(x % 2 != 0 && digitCounter == 1){
System.out.println("odd single-digit number");
}else if(x % 2 == 0 && digitCounter == 2){
System.out.println("even two-digit number");
}else if(x % 2 != 0 && digitCounter == 2){
System.out.println("odd two-digit number");
}else if(x % 2 == 0 && digitCounter == 3){
System.out.println("even three-digit number");
}else if(x % 2 != 0 && digitCounter == 3){
System.out.println("odd three-digit number");
}
}
}

resultof dividing two integral numbers is anintegral number. The fractional part is cut off. This will always result in an even number.x /= 10;is always an even number. So in your casex % 2is always 0. Try the easy version: