var questions = [
["What is the capital of England?", "LONDON", "You know, where the queen lives"],
["What is the capital of France?", "PARIS", "Remember the eiffel tower?"],
["What is the capital of Canada?", "OTTAWA", "Lot of mooses there"]
];

var correctAnswers = 0;

for (var i = 0; i < questions.length; i++) {
    var answer = prompt(questions[i][0]);
    if (answer.toUpperCase() == questions[i][1]) {
        alert("Correct! " + questions[i][2]);
        correctAnswers++;
    }
    else {
        alert("incorrect, the correct answer was " + questions[i][1]);
    }
}