## Correct Equation?Trick brain teasers appear difficult at first, but they have a trick that makes them really easy.2 x 10 = 2 x 11
This is a correct statement, because 2 x 10 (in base 10) equals 2 x 11 (in base 9). Generalized: N>=3; 2 x 10 (in base N) = 2 x 11 (in base N-1). Can you find another way to justify that this equation is actually correct? ## What Next?
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