I made it really complicated! Is it a good practice to do it like this?

var totalScore = 5;
//First Question
var correctQuestion1 = false;
var question1 = prompt("What is the first Computer language for the a web designer?");
if ( question1.toUpperCase() === "JAVASCRIPT" ) {
  correctQuestion1 = true;
} else {
  totalScore -= 1;
}
if ( correctQuestion1 ) {
  alert("Correct");
} else {
  alert("Wrong");
}
//2nd Question
var correctQuestion2 = false;
var question2 = prompt("What is 20+10?");
if ( parseInt(question2) === 30 ) {
  correctQuestion2 = true;
} else {
  totalScore -= 1;
}
if ( correctQuestion2 ) {
  alert("Correct");
} else {
  alert("Wrong");
}
//3rd Qestion
var correctQuestion3 = false;
var question3 = prompt("What is the First name of Treehouse's JavaScript Teacher?");
if ( question3.toUpperCase() === "DAVE" ) {
  correctQuestion3 = true;
} else {
  totalScore -= 1;
}
if ( correctQuestion3 ) {
  alert("Correct");
} else {
  alert("Wrong");
}
//4th Question
var correctQuestion4 = false;
var question4 = prompt("Is Math Important for JavaScript? Y or N");
if ( question4.toUpperCase() === "YES"  || question4.toUpperCase() === "Y" ) {
  correctQuestion4 = true;
} else {
  totalScore -= 1;
}
if ( correctQuestion4 ) {
  alert("Correct");
} else {
  alert("Wrong");
}

//5th Question
var correctQuestion5 = false;
var question5 = prompt("What is 20x10?");
if ( parseInt(question5) === 200 ) {
  correctQuestion5 = true;
} else {
  totalScore -= 1;
}
if ( correctQuestion5 ) {
  alert("Correct");
} else {
  alert("Wrong");
}
alert("Your total score is " + totalScore);

// Medal for score

if ( totalScore === 5 ) {
  document.write("You got Gold medal");
} else if ( totalScore === 3 || totalScore === 4 ) {
  document.write("You got Silver Medal");
} else if ( totalScore === 2 || totalScore === 1 ) {
  document.write("You got Bronze Medal");
} else {
  document.write("Better Luck next Time");
}