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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?
Doctor Brilliantstein wants her creation's feet to support as much weight as possible. How can she achieve her goal?
A newscaster is interviewing four people who won the lottery. How much did an interviewee win, and which state are they from?
In cities, we often care more about walking than absolute distances. What's the optimal place for Xavier's cafe?
In this game, players move a token across a square grid. Do we know the winner before the game even starts?
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.
Humans always tell the truth, and werewolves always lie. Can you determine which of these Londoners is which?
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