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This smart card can find the card the spectator picked, every time. Incredible!
Turn over, add up and impress!
Red or black? One question is all it takes to wow you!
With a few operations, find the values of the three dice!
Cot cot cot! The hens laid their eggs! Help John count how many there are.
Can you put back these 5-square pieces?
Cut squares out of rectangles!
This puzzle requires stamina!
Look at this assortment of beautiful kites!