Credit: ITV News But did you crack the code? The answers 10 of the 13 clues are images representing the phonetic alphabet and homophones for letters in English or French.

To crack the code, you must decipher the relation among the letters and numbers that each term in the sequence presents. Once cracked, the missing term becomes obvious.

To crack the code, you must decipher the relation among the letters and numbers that each term in the sequence presents. Once cracked, the missing term becomes obvious.

Brain teaser: Can you crack the code and find the missing number in the triangle? Math puzzles have a special way of making even the sharpest minds stop and think.

Now, GCHQ has given MailOnline the answers to the tricky questions. The annual challenge is part of GCHQ's Christmas card featuring the agency's wartime home, Bletchley Park.

Britain's electronic snoops are offering wannabes the chance of a job – if they crack this fiendish code. Bosses at GCHQ, which monitors internet and radio traffic to detect terrorists and other ...

These puzzles require a bit of "outside the box" thinking in most cases and some answers make little sense. Do Not Believe His Lies: The Unforgiving Riddle utilizes an assortment of riddle devices ...