CODE PUZZLEBOX

Welcome to the Code Puzzlebox! Solve each puzzle to unlock the next level. Can you make it to the end?

Puzzle 1: Pattern Recognition

Level 1/5

Find the next number in this sequence:

2, 4, 8, 16, 32, ?

Need a hint?

Think about what operation is being performed from one number to the next.

Puzzle 2: Fix the Code

Level 2/5

This JavaScript function should return the factorial of a number, but it has a bug. Fix the code:

function factorial(n) {
    if (n === 0) return 1;
    return n - factorial(n - 1);
}

What is the correct operator to replace the "-" in the return statement?

Need a hint?

The factorial of a number is the product of all positive integers less than or equal to that number.

Puzzle 3: Decode the Message

Level 3/5

This encoded message contains a password. Decode it by shifting each letter backward by 3 positions in the alphabet:

frgh_flskhu

Need a hint?

This is a Caesar cipher. For example, 'd' shifted backwards by 3 becomes 'a'.

Puzzle 4: Logic Gate

Level 4/5

What is the output of this logic expression?

let a = true;
let b = false;
let c = true;
let result = (a && b) || (c && !b);

Need a hint?

Break it down step by step: First evaluate (a && b), then (c && !b), then combine with OR.

Puzzle 5: Complete the Code

Level 5/5

This code should check if a string is a palindrome (reads the same forward and backward). What's the missing line?

function isPalindrome(str) {
    // Normalize the string: lowercase and remove non-alphanumeric
    str = str.toLowerCase().replace(/[^a-z0-9]/g, '');
    
    // MISSING LINE HERE
    
    // Compare the original with its reverse
    return str === reversed;
}

What should the missing line be to create the reversed string?

Need a hint?

You need to create a variable called 'reversed' that holds the string in reverse order. In JavaScript, one way to reverse a string is to split it into an array, reverse the array, then join it back.

🎉 Puzzlebox Solved! 🎉

Congratulations! You've solved all the puzzles and unlocked the code puzzlebox.

Secret Code: CODEMASTER2025

Feel free to inspect the source code to see how this puzzlebox was built!