<!DOCTYPE html>
<html>
<body>
<h2>4+5=?</h2>
<p id="demo"></p>
<button type="button" onclick ='document.getElementById("demo").innerHTML = "Correct Answer!!"'>9</button>
<button type="button" onclick='document.getElementById("demo").innerHTML = "Wrong Answer!!"'>5</button>
<button type="button" onclick='document.getElementById("demo").innerHTML = "Wrong Answer!!"'>4</button>
<button type="button" onclick='document.getElementById("demo").innerHTML = "Wrong Answer!!"'>7</button>
</body>
</html>
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