Correct and Incorrect Questions are not appearing to the page.

var correctanswers = 0;
var question;
var answer;
var response;
var html;
var questionsRight = [ ];
var questionsWrong = [ ];

var quiz = [
  ["How many States are there?", 50],
  ["What year is it?", 2018],
  ["How many legs does a spider have?", 8]
]



function print(message) {
  var outputDiv = document.getElementById("output");
  outputDiv.innerHTML = message;
}

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


for (var i = 0; i < quiz.length; i+=1) {
  question = quiz[i][0];
  answer = quiz[i][1];
  response = parseInt(prompt(question));

  if (response === answer) {
    correctanswers +=1;
    questionsRight.push [question];
  }
   else {
      questionsWrong.push [question];        
     }
}

console.log(questionsRight);
console.log(questionsWrong);
html = "You got " + correctanswers + " question(s) correct.";
html += "<h2>Questions you got correct.</h2>";
html += buildList(questionsRight);
html += "<h2>Questions you got incorrect.</h2>";
html += buildList(questionsWrong);



print(html);