Why my code is not working?

var correct = 0;

var string_ques1 = prompt("How many Continents are there in the world?");
var ques2 = prompt("Largest continent in the world?");
var string_ques3 = prompt("How many Oceans are there in the world?");
var ques4 = prompt("What is the capital of Australia?");
var ques5 = prompt("Which is the longest river in the world");

ques1 = parseInt(string_ques1);
ques3 = parseInt(string_ques3);

if (ques1 ==== 7) {
    correct +=1
}
if (ques2.toUpperCase ==== 'ASIA') {
    correct +=1
}
if (ques3 ==== 5) {
    correct +=1
}
if (ques4.toUpperCase ==== 'CANBERRA') {
    correct +=1
}
if (ques5.toUpperCase ==== 'NILE') {
    correct +=1
}

document.write("<p>You got " + correct + " out of 5 questions correct.</p>");


if (correct === 5) {
    document.write("Gold Crown");
} else if (correct >= 3) {
    document.write("Silver Crown");
} else if (correct >= 1) {
    document.write("Bronze Crown");
} else {
    document.write("duh !You are good for nothing.");
}