A balance scale appears with objects on each side. Logic clues reveal their relative weights. Determine which side is heavier — or if they balance — in as few seconds as possible.
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No — just determine which side is heavier or if they're equal.
Five mate-in-1 positions. Find the checkmate. Speed and accuracy both scored.
Find the shape that completes the visual sequence.
Four things. Three share a hidden connection. Find the one that doesn't belong.
Solve equations where each colour has a hidden value.