Thread: Making A Quiz With Loops, Incompatible Type Error

My homework was to create a program that prompts the user with questions.
They will get 5 attempts, each attempt that they guess incorrectly the program will deduct 5 points until they reach 0.
Each question is worth 20 points.

I have made the code as best as I can but for some reason I cannot total all of the scores for each question without getting the "incompatible type" error.

import java.util.Scanner; // Needed for the Scanner class
 
/**
   This program demonstrates a case insensitive string comparison.
*/
 
public class FiveQuestionsII
{
 
 
 
   public static void main(String[] args)
   {
 
//QUESTION 1
 
	int number1 = 20;
	String total;
	String ans1, ans2, ans3, ans4, ans5;
	Scanner keyboard = new Scanner(System.in);
	int counter = 0;
 
      System.out.print("1. What is each repetition of a loop known as?\nAnswer: ");
      ans1 = keyboard.nextLine();
 
      while(counter < 4 && !ans1.equals("iteration") && !ans1.equals("Iteration")) {
      System.out.print("Incorrect, please try again " + "\nAnswer: ");
		counter++;
		number1 = 20 - (counter*5);
 
		ans1 = keyboard.nextLine();		
	}
		System.out.println("You scored " + number1 + " points out of 20 for that question.\n(Answer: iteration)");
 
 
//QUESTION 2
 
     int number2 = 20;
     System.out.print("2. The while loop is this type of loop...\nAnswer: ");
     ans2 = keyboard.nextLine();
 
     while(counter < 4 && !ans2.equals("pretest") && !ans2.equals("Pretest")) {
     System.out.print("Incorrect, please try again " + "\nAnswer: ");
		counter++;
		number2 = 20 - (counter*5);
 
			ans2 = keyboard.nextLine();		
	}
		System.out.println("You scored " + number2 + " points out of 20 for that question.\n(Answer: pretest)");
 
//QUESTIONS 3
 
     int number3 = 20;
     System.out.print("3. This is a special value that signals when there are no more items from a ist of items to be processed...\nAnswer: ");
     ans3 = keyboard.nextLine();
 
     while(counter < 4 && !ans3.equals("sentinel") && !ans3.equals("Sentinel")) {
     System.out.print("Incorrect, please try again " + "\nAnswer: ");
		counter++;
		number3 = 20 - (counter*5);
 
			ans3 = keyboard.nextLine();		
	}
		System.out.println("You scored " + number3 + " points out of 20 for that question.\n(Answer: sentinel)");
 
//QUESTION 4
 
     int number4 = 20;
     System.out.print("4. This class allows you to read a line from a file... \nAnswer: ");
	  ans4 = keyboard.nextLine();
 
     while(counter < 4 && !ans4.equals("Scanner") && !ans4.equals("scanner")){    
		System.out.print("Incorrect, please try again " + "\nAnswer: ");
			counter++;
			number4 = 20 - (counter*5);
 
			ans4 = keyboard.nextLine();		
			}
	System.out.println("You scored " + number4 + " points out of 20 for that question.\n(Answer: scanner)");
 
//QUESTION 5
 
	  int number5 = 20;
	  System.out.print("5. This type of loop has no way of ending and repeats until the program is interrupted... \nAnswer: ");
		  ans5 = keyboard.nextLine();
 
	  while(counter < 4 && !ans5.equals("Infinite") && !ans5.equals("infinite")){    
		System.out.print("Incorrect, please try again " + "\nAnswer: ");
			counter++;
			number5 = 20 - (counter*5);
 
			ans5 = keyboard.nextLine();		
			}
	System.out.println("You scored " + number5 + " points out of 20 for that question.\n(Answer: infinite");
 
//TOTAL SCORING
 
       total = number1 + number2 + number3 + number4 + number5;
		System.out.println("\n\nYour total score:" + total);
 
   }
}

ERROR:

FiveQuestionsII.java:98: incompatible types
found   : int
required: java.lang.String
       total = number1 + number2 + number3 + number4 + number5;
                                                     ^
1 error

I'm a beginner, sorry if my code is sloppy.

Thank you so much !