Here's my try and fail! Ready to look now to see how this should be pulled off.

var correctAnswers = 0;  //assigns a starting value of 0 for correctAnswers

// Will store the answers to your "prompts" in questionOne thru questionFive
var questionOne = prompt("Hello, and lets begin the test! What is 2 x 2")  
var questionTwo = prompt("Number 2. What is 4 + 4?")
var questionThree = prompt("Ok, number 3. What is 5 x 5?")
var questionFour = prompt("Now, almost done. What is 4 - 3?")
var questionFive = prompt("last question! What is the capital of Idaho?")

// create conditionals to check the inputted answer from the user against the correct answer
// use parseInt() to check number value since when a user enters a value from prompt it will be a string
// question 5 is using toLowerCase() that way it will automatically convert their answer to all lowercase
// since we don't know if they will mix and match lower and uppercases
// also we use '===' because we want to compare their answer to the correct answer

if (parseInt(questionOne) === 4){
  correctAnswers +=1
}
if (parseInt(questionTwo) === 8){
  correctAnswers +=1
}
if (parseInt(questionThree) === 25){
  correctAnswers +=1
}
if (parseInt(questionFour) === 1){
  correctAnswers +=1
}
if (questionFive.toLowerCase() === 'boise'){
  correctAnswers +=1
}

// Use an if/else so we can check what their prize is
// You can set this is multiple different way I'll explain why I did it this way
// First if checks for all 5 right. If true then alerts the winner of gold crown
// Else if is set for correctAnswers>= 3 . So if the correctAnswers is 3 or 4 then they will get a silver crown. 
// We don't have to worry about it being 5 right because if it was 5 then it would have stopped at the first if with the gold crown
// Same deal with the second else if is set for correctAnswers >= 1 because it will cover if 1 or 2 are right
// Last but not least the `else` will cover if you have 0 right.

if (correctAnswers === 5){
alert('You received a gold crown')
} else if (correctAnswers >= 3){
alert('You received a silver crown')
} else if (correctAnswers >= 1){
alert('You received a bronze crown')
} else {
alert("I'm sorry but you didn't receive a crown")
}