Schlumberger

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## Interview Question

Field Specialist Interview Red Deer, AB (Canada)

# What is the angle between the hour hand and minute hand on

a clock when it is 3:15?

7

7.5 degrees

Interview Candidate on May 7, 2012
2

I think it's more likely 0degrees

yo on Aug 4, 2012
0

90 degree.

1

0

0

no angle.

0

13 degree

hh on Jan 18, 2013
6

The answer is 7.5 degrees. There is a 30 degree difference between each number on a clock. (360 degrees/ 12 = 30 degrees). Therefore, the hour hand moves 30 degrees every 60 minutes. The time given is 3:15, so we know that the minute hand pointed directly at the 3, but the hour hand is somewhere between the 3 and the 4. 15 minutes has passed and we know there are four 15 minute segments in an hour. We also know that it take the hour hand 60 minutes to move the full 30 degrees. So if we divide the 30 degrees that the hour hand will move in 60 minutes, by 4 because 15 minutes has passed by and there are 4 fifteen minute segments in 60 minutes, we find that the hour hand moves 7.5 degrees every 15 minutes. So at 3:15 the angle between the minute hand and the hour hand is 7.5 degrees.

cdw on Apr 3, 2013