Brain Teasers
Correct Equation?
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?
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?
Hint
Remember it is in the trick category, not math.Answer
Twice ten is twenty, twice eleven is twenty too (two).Hide Hint Show Hint Hide Answer Show Answer
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