This Calcdoku doesn’t have many clues, but that can make it easier to find a place to start. Which gives you more information — a sum or a product?
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Doctor Brilliantstein wants her creation's feet to support as much weight as possible. How can she achieve her goal?
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A newscaster is interviewing four people who won the lottery. How much did an interviewee win, and which state are they from?
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In cities, we often care more about walking than absolute distances. What's the optimal place for Xavier's cafe?
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In this game, players move a token across a square grid. Do we know the winner before the game even starts?
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We know the total area of this infinite stack of shrinking triangles. With that information, we can find the area of the triangle they’re inside of.
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Humans always tell the truth, and werewolves always lie. Can you determine which of these Londoners is which?
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