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A biotechnologist started an automated half-hourly recording of the conditions of a cell culture at 9 AM on 13 January 2

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A biotechnologist started an automated half-hourly recording of the conditions of a cell culture at 9 AM on 13 January 2

by Vincen » Sun Jan 03, 2021 7:59 am

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A biotechnologist started an automated half-hourly recording of the conditions of a cell culture at 9 AM on 13 January 2015. The dial on the recording device moved clockwise through one interval (for example, from A to B) after every 10 recordings. If the dial was at point A at 9 AM on 13 January 2015, what was the position of the dial, time, and date respectively when the 420th recording of the cell culture was taken?

A. B, 3 AM, 21 January 2015

B. B, 6 AM, 21 January 2015

C. C, 6 PM, 21 January 2015

D. C, 3 AM, 22 January 2015

E. B, 6 AM, 22 January 2015

Answer: D

Source: e-GMAT
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