Build a pyramid from ground up with single-digit number blocks. Help the pharaohs of ancient Egypt supervise the construction of pyramids before your glorious return to the home planet. Erect scaffolds and apply arithmetic operations (addition, subtraction, multiplication and division) on the number blocks on lower tiers to create the number blocks on higher tiers. Upper-tier number blocks and scaffolds can only be built if a solid foundation has been laid on the lower tiers. A red number is the number a block at the particular location must carry in order to form a solid foundation.
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