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# A certain musical scale has 13 notes, each having a different frequenc

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A certain musical scale has 13 notes, each having a different frequenc  [#permalink]

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22 Sep 2019, 22:20
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A certain musical scale has 13 notes, each having a different frequency, measured in cycle per second. In the scale, the notes are ordered by increasing frequency, and the highest frequency is twice the lowest. For each of the 12 lower frequencies, the ratio of frequency to the next higher frequency is a fixed constant. If the lowest frequency is 440 cycle per second, then the frequency of 7th note in the scale is how many cycle per second ?

A. 440 *square root 2
B 440* 7th power of 2
C 440* 12th power of 2
D 440 * 12th power of 2^7
E440 * 7th power of 2^12
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Joined: 02 Sep 2009
Posts: 58396
Re: A certain musical scale has 13 notes, each having a different frequenc  [#permalink]

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22 Sep 2019, 22:38
dharam44 wrote:
A certain musical scale has 13 notes, each having a different frequency, measured in cycle per second. In the scale, the notes are ordered by increasing frequency, and the highest frequency is twice the lowest. For each of the 12 lower frequencies, the ratio of frequency to the next higher frequency is a fixed constant. If the lowest frequency is 440 cycle per second, then the frequency of 7th note in the scale is how many cycle per second ?

A. 440 *square root 2
B 440* 7th power of 2
C 440* 12th power of 2
D 440 * 12th power of 2^7
E440 * 7th power of 2^12

Discussed here: https://gmatclub.com/forum/a-certain-mu ... fl=similar
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Re: A certain musical scale has 13 notes, each having a different frequenc   [#permalink] 22 Sep 2019, 22:38
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