Help on - TWO DIMENTIONAL ARRAYS- please

var Questions = [
  [
    "How many kids you have",
    2
  ],
  [
    "Flat number",
    20
  ],
  [
    "What is your name?",
    "Faisal"
  ]

];
var html = '';
var question;
var answer;
var response;
var correct = [];
var wronge = [];
var rightanswer = 0;
var wronganswer = 0;



function print(message){
document.write(message);
}

function buildlist(list){
var listHTML = "<ol>";
  for(var i =0; i< list.length; i +=1){
   listHTML+= "<li>" + list[i] + "</li>";
  }
listHTML+= "</ol>";
  return listHTML;
}

for(var i =0; i< Questions.length; i +=1){
question = Questions[i][0];
answer = Questions[i][1];
response = parseInt(prompt(question));
  if(response === answer){
 rightanswer+=1;
    correct.push(question + ". <h2> answer was  = "+ answer + "</h2>");
  }
else{
wronganswer+=1;
  wronge.push(question + ". Correct answer was = " + answer);
}
}

html ="You have correctly answered " + rightanswer + " questions correctly";
html+= "<h2>Questions answered correctly are: </h2>";
html+=buildlist(correct);

html+="You have incorrectly answered " + wronganswer + " questions";
html+= "<h2>Questions answered incorrectly are: </h2>";
html+=buildlist(wronge);

print(html);