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?
HintRemember it is in the trick category, not math.
AnswerTwice ten is twenty, twice eleven is twenty too (two).
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