A few extraterrestrials arrived. They had two hands, but
Chapter 17, Problem 64(choose chapter or problem)
A few extraterrestrials arrived. They had two hands, but claimed that . How many fingers did they have on their two hands? Note that our decimal system (and ten characters: 0, 1, 2, , 9) surely has its origin because we have ten fingers. [Hint: 11 is in their system. In our decimal system, the result would be written as 5.]
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