Anzan
Mental calculation, no abacus allowed. Pick how you want to train.
Flash Anzan
Numbers flash one at a time — add them up from memory.
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Guided Visualization
60 seconds, spoken finger-movement guidance for every bead.
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Image Flash
An abacus image flashes instead of a number — read the beads.
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Audio Challenge
Numbers are spoken aloud, nothing shown — listen and calculate.
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