Caesar Cipher Challenge: Find the Hidden Number
We've hidden a number using three layers of encryption:
Numeric Caesar shift (+5) Digit-to-letter mapping (1 = A, 2 = B, …, 9 = I, 0 = J) Reverse the string
Ciphertext: GDCBJA
👉 What’s the original number?
Hint: The hexadecimal color corresponding to the number is part of the blue color family.
💡 Prize The first correct reply wins a 5% discount on our Featured Products.
Please make sure your country is covered by our Shipping Policy before participating.
⚠️ Rules
The first correct reply wins.
You may use any tool, including AI, to solve the cipher.
We’ll send the discount code via DM.
The discount code is valid for one-time use only and expires 10 days after it is sent.
This quiz remains active until the end of June 2026 or until the first correct answer is received, whichever comes first.










