Logical Reasoning :: Logical Problems - Discussion
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A call center agent has a list of 305 phone nos of people in alphabetic order of names (but she does not have any of the names). she needs to quickly contacts deepak sharma to convey a message to him.If each call takes 2 minutes to complete, and every call is answered, what is the minimum amount of time in which she can guarantee to deliver the message to Mr.Sharma.
Asked In ::
13 Aug, 2019 9:53 PM
Here is how it works.
Pick out the middle phone number from the list. In this case it would be 152. Call this person and ask his/her name. Let us consider the name is Lalitha. Obviously Deepak should be present before Lalitha. So, you can ignore all phone numbers from 152-305. Again pick out the middle number from the list of 1-151. Do this repetitively until you find Deepak.
So, the minimum time to deliver a message to Deepak Sharma
9 times call*2 min each =18min
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