Quiz score is not adding correctly - what am I doing wrong?

// JavaScript Document

//*ask 5 questions and keep track of number of correct answers

var score = 0;

var question1 = prompt('Which Hindu deity is known as the god of destruction?');
if (question1.toUpperCase() === 'SHIVA') {
  score += 1;
}

var question2 = prompt('What is the capitol of North Dakota?');
if (question2.toUpperCase() === 'BISMARK') {
  score += 1;
}

var question3 = prompt('What animal has a long neck and brown spots?');
if (question3.toUpperCase() === 'GIRAFFE') {
  score += 1;
}

var question4 = prompt('How many continental states are there in the USA?');
if (question4.toUpperCase() === '48' || 'FORTY-EIGHT' || 'FORTY EIGHT') {
  score += 1;
}

var question5 = prompt('What is 35 * 2 - 4?');
if (question5 === '66') {
  score += 1;
}


//provide final answer after quiz with number of correct answers
//rank the player: 5/5 = gold, 3-4 = silver, 1-2 = bronze, 0 = no crown :(

if (score === 5) {
    alert('You answered ' + score + ' out of 5 questions correctly. Congratulations! You\'ve won a Gold Crown!');
} else if (score >= 3) {
    alert('You answered ' + score + ' out of 5 questions correctly. Congratulations! You\'ve won a Silver Crown!');
} else if (score >+ 1) {
    alert('You answered ' + score + ' out of 5 questions correctly. Congratulations! You\'ve won a Bronze Crown!');
} else {
    alert('Bummer! You didn\'t answer any questions correctly. Try again!');
}