Freedom to learn, deliberation in answering

• The libraryShort articles that take you around the world — language and literature, astronomy and geography, history and religion — each with something to surprise you. With exercises and their answers to prepare you for the real challenge, at your own pace: no counter, no score, no verdict.
• The puzzlesHere the real challenge begins, with two constraints: limited time and counted attempts — your chance to show your wit, your knowledge and your perseverance when the challenge is real. When the time runs out or the attempts are spent, the puzzle closes for an hour — not as a punishment, but as an invitation to think before you answer.
• The levelFour levels, the same puzzles:Gentletwice the timeNormalthe usual timeHardless timeExtremehalf the timeThe level does not change the puzzles; it changes the time you give yourself.

What is inside

More than five hundred puzzles of ten kinds — odd one out, ditloids, sequences, letter ordering, the jump square, symbol sums, missing operators, symbol scales, logic and language puzzles — and a library of more than two hundred short articles, to read before a puzzle or after it, as you wish. And in Ramadan, a puzzle and an article for every night.

It is not because things are difficult that we do not dare; it is because we do not dare that they are difficult.Seneca, Letters to Lucilius