Have you heard the one about using eight 8s to come up with exactly 1,000 (8 ? 8 ? 8 ? 8 ? 8 ? 8 ? 8 ? 8 = 1,000)? This mind-tickling Web site features a fresh puzzle each week, ranging from logic conundrums and digital manipulations to tricky puns and classic anagrams. Lots of oldies but goodies. Solutions are provided for those who get stuck. The archive now contains more than 200 brainteasers.

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