Text-based question and answer service AQA 63336 has announced it has reached the impressive milestone of answering its 20 millionth question.

The milestone puzzler, asked 6pm on 29 September, was: "Which hero featured in books by Captain W E Johns?". As fans of the series will know, the answer is Biggles.

The most popular question ever, asked by 47,189 customers since April 2004, is apparently "how does AQA work?" The second most popular question, with 31,350 questions in 5 years, is "what's the meaning of life?"

As far as unusual or notable answers go, AQA says they've sorted out a rescue team for someone stuck in the jungle in Thailand and predicted a winning race horse, netting the punter £33k.