a call center agent has a list of 305 phone numbers of people in alphabetic order of names (but she does not have any of the names). She needs to quickly contact 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. Pick one.
A) 18
B) 19
C) 20
D) 21
E) 22
Since the agent does not have any of the names, he calls all 305 numbers.   Depending on the response, he divides the number into two halves 305/2   i.e. 152 or 153(choose as you like,I chose 152),   if the name deepak sharma lies in first half of 152,   then he calls all 152 numbers and check each time dividing by 2 until he finally connects with deepak sharma...   so the sequence will be 152,76,38,19,9,4,2,1,0. since total number of tries is 9...   minimum time required will be 9*2= 
<gadget id="calculator">9*2</gadget>
<output>18</output>
18minutes   18NSWER:18
<result>A</result>
a call center agent has a list of 305 phone numbers of people in alphabetic order of names (but she does not have any of the names). She needs to quickly contact 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.