Don't know why its not fully running(JavaScript Basics)

Here is my code for the in-video practice. here is a link to the video solution teamtreehouse.com/library/the-conditional-challenge-solution-2 The code partially works but the questions 3 and 4 aren't working and i dont know why.

let correctCount = 0;

let question1 = prompt("How many stars were on the original US flag?"); let question2 = prompt("How many senators are in congress?"); let question3 = prompt("What US currency is Abraham Lincoln on? answer starting with 'The' such as 'The dime'."); let question4 = prompt("Who is was the first president of the United states?"); let question5 = prompt("How many stars are on the CURRENT US flag?");

if (+question1 === 13 || question1.toUpperCase === "THIRTEEN") { correctCount += 1; }

if(+question2 === 100 || question2.toUpperCase === "ONE HUNDRED" || question2.toUpperCase === "1 HUNDRED") { correctCount += 1; }

if (question3.toUpperCase === "THE PENNY" || question3.toUpperCase === "THE FIVE DOLLAR BILL" || question3.toUpperCase === "THE 5 DOLLAR BILL" ){ correctCount += 1; }

if (question4.toUpperCase === "GEORGE WASHINGTON") { correctCount += 1; }

if (+question5 === 50 || question5.toUpperCase === "FIFTY") { correctCount += 1; }

let playerRank = " ";

if (correctCount === 0) { playerRank = "0 correct = No crown"; }

else if (correctCount === 1 || correctCount === 2) { playerRank = "1-2 correct = Bronze";}

else if (correctCount === 3 || correctCount === 4) { playerRank = "3-4 correct = Silver";}

if (correctCount === 5) { playerRank = "5 correct = Gold";}

document.querySelector('main').innerHTML = <h1>You Got ${correctCount} Out Of 5 Correct</h1> <p>${playerRank}</p>;