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marbil | 14:35 Wed 11th Jul 2007 | Quizzes & Puzzles
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what is the ratio of black to white keys on a piano
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Theoretically, it should be 5 black to every 7 white (over an octave but one key) ~ but what it is over the entire keyboard may be different!
there are 88 keys. 52 white, 36 black.

ratio black to white = 36:52 = 18: 26 = 9:13.

the answer is 9:13.
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thank you teacher1, sounds as though you know your stuff,
You should take teacher1's keyboard-based answer of 9:13 (= 1 to 1.444...) before the octave-based answer of 5:7 (= 1 to 1.4)

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