Cant figure this out

When I run this into the browser and do a console.log(correctQ); in console. the only value that is stack in it where ["H", "o"]. whats the problem here? thanks.

var questions = [ ['How many states are in the United States?', 50], ['How many continents are there?', 7], ['How many legs does an insect have?', 6] ];

var correctQ = [];

var wrongQ = [];

var correctAnswers = 0;

var wrongAnswers = 0;

var question;

var answer;

var response;

var html;

var htmlListr;

var htmlListw;

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

for (var i = 0; i < questions.length; i += 1 ) { question = questions[i][0];

answer = questions[i][1];

response = prompt(question);

response = parseInt(response);

if (response === answer)

{correctAnswers += 1;

correctQ.push (question[i][0]);

} else

{

  wrongAnswers += 1;

  wrongQ.push (question[i][0]);

}

}

html = "You got " + correctAnswers + " question(s) right."

print(html);