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A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

Math & LogicOne small ahaSum

9 + 12

Think it. Then flip it. ahamoraTap to reveal Back to the cue
Math & LogicOne small aha
Your new aha21

9 + 12 = 21. Changing the order gives 12 + 9, the same sum. Source: Addition ↗

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