Cannot see my logical error, please help

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Java

hi: I am building my final project and i know there is logical errors in it to which i cannot see. the game goes like this: it is a multiple choice math java game. it has three rounds. addition subtraction and division. i have already gotten the addition round working like it supposed to. it is the subtraction and the division rounds is where there is the logical error. for some reason it is skipping the second rounds and going straight to the third rounds. in round three it is generating zero for the user to divide and it must not generate zero and another thing is that it supposed to say round 3 level 9 instead it is saying round 3 level 4. can somebody help me fix this

some logical error causing to skip the second round and another one causing it to generate zero and the level.

What I have tried:

int num ;
            
            while(i>=5 && i<=8 && wrongcount <4)
            {
                i++;
                //get random numbers
                largest  = 1 + randobj.nextInt(25);
                smallest = 2 + randobj.nextInt(9);
                correct_ans = largest - smallest;
                incorrect_ans = 1 + randobj.nextInt(35);
                
                while(correct_ans == incorrect_ans)
                {
                    incorrect_ans = 1 + randobj.nextInt(35);
                }
                if(i == 1)
                {
                    //getting the largest and smallest number 
                    largest  = num1;
                    smallest = num2;
                }
                else
                {
                    if(num1 > largest)
                    {
                       largest = num1;
                    }
                    if(num2 > smallest)
                    {
                       smallest = num2;
                    }
                }
                //indicate the round and level would be starting from
                System.out.println(playername+" round 2 "+" level "+ i +" match the letter with the correct answer");
                System.out.println(playername+" please subtract "+ largest + " - "+smallest);
                
                System.out.println("A:"+correct_ans);
                System.out.println("B:"+incorrect_ans);
                uSelect = reader.next().charAt(0);
                
                if(uSelect == 'A' || uSelect == 'a')
                {
                    System.out.println(playername+"awwwwsome, well done,  answer is correct, you are doing good, keep up the good work");
                    totalscore +=350;
                    System.out.println("round 2");
                    System.out.println("level "+ i);
                    totalscore +=score;
                    System.out.println("total score it"+totalscore);
                }
                else 
                {
                    while(uSelect != 'A' && uSelect != 'a' & wrongcount < 4)
                    {
                        System.out.println(playername+" awww come on now wrong answer, let's do this again ");
                        totalscore -=175;
                        System.out.println("round 2");
                        System.out.println("level "+ i);
                        totalscore -=score;
                        System.out.println("total score:"+totalscore);
                        
                        if(wrongcount <4)
                        {
                            System.out.println(playername+" round 2 "+ "level "+ i+" match the letter with the correct answer");
                            System.out.println(playername+" please subtract "+ largest + " - "+ smallest);
                            
                            System.out.println("A:"+correct_ans);
                            System.out.println("B:"+incorrect_ans);
                            uSelect = reader.next().charAt(0);
                            
                        }
                    }
                }
            }
           
            
            System.out.println("\n*******************welcome to round***3*divide**round****************************");
            
            
            while(i>=9 && i<=10 && wrongcount < 4)
            {
                i++;
                //get random numbers
                numerator   = 1 + randobj.nextInt(25);
                denominator = 2 + randobj.nextInt(9);
                numvalue  = 1 + randobj.nextInt(25);
                numvalue2 = 2 + randobj.nextInt(9);
                correct_ans = numerator = denominator * numvalue2;
                correct_ans = numerator / denominator;
                incorrect_ans = 1 + randobj.nextInt(35);
                
                while(correct_ans == incorrect_ans)
                {
                    incorrect_ans = 1 + randobj.nextInt(35);
                }
                System.out.println(playername+" you are on round 3 "+" level "+ i + " match the letter with the correct answer");
                System.out.println(playername+" please divide "+ numerator + " / "+ denominator);
                
                System.out.println("A:"+incorrect_ans);
                System.out.println("B:"+correct_ans);
                uSelect = reader.next().charAt(0);
                
                if(uSelect == 'B' || uSelect == 'b')
                {
                    System.out.println(playername+" hey that's great, correct is right, keep up the good worl");
                    totalscore +=350;
                    System.out.println("round 3");
                    System.out.println("level "+ i);
                    totalscore +=score;
                    System.out.println("total score:"+totalscore);
                }
                else
                {
                    while(uSelect !='B' && uSelect !='b' && wrongcount < 4)
                    {
                        System.out.println(playername+" tsk, tsk, nice bangbang!!! that is wrong, please try again, kiddooo!!!");
                        totalscore -=175;
                        System.out.println("round 3");
                        System.out.println("level "+ i);
                        totalscore -=score;
                        System.out.println("total score: "+totalscore);
                        
                    }
                }
                
            }
            while(wrongcount < 4)
            {
                System.out.println(playername+" you are on round 3 "+ " level "+ i + " match the letter with the correct answer");
                System.out.println(playername+" please divide "+ numerator + " / "+ denominator);
                
                System.out.println("A:"+incorrect_ans);
                System.out.println("B:"+correct_ans);
                uSelect = reader.next().charAt(0);
                
            }
        }    
        else
        {
            System.out.println(playername+"that is not a valid character");
            System.exit(0)