Number / Math games
Crack the equation, hit the target number or spot the sequence. Daily puzzles for people who love digits.
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Fermi Unlimited (opens the game in a new tab)
Estimate a real-world number nobody knows offhand, then see the worked answer. Unlimited play.
Fermi Unlimited: details and ratingsHexSpoke (opens the game in a new tab)
SpellSpoke's evil twin. Six 5-letter isograms on a hex asterisk with Sudoku-style constraints — no letter repeats within any word, no letter repeats at the same position across words. Get 6 free global letter reveals, then switch to placing specific letter
HexSpoke: details and ratings