#math trivia for #May6: How can #127 be computed from 1, 2, and 7 using only two operations from +, -, *, /, and ^ (exponentiation)?
— Burt Kaliski Jr. (@modulomathy) May 6, 2012
Having exponentiation as an operator helps out here, because 2^7 = 128. The answer is
2^7 – 1 = 127
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