Five friends - Alex, Ben, Charlie, David, and Emily - are standing in a row. Charlie is standing next to Ben, and David is standing next to Emily. If Alex is not standing next to David, who is standing at the third position?
Q1. Five friends - Alex, Ben, Charlie, David, and Emily - are standing in a row. Charlie is standing next to Ben, and David is standing next to Emily. If Alex is not standing next to David, who is standing at the third position?
Answer: Charlie
Explanation: Since Charlie is next to Ben and David is next to Emily, we have two blocks: (Ben, Charlie) or (Charlie, Ben) and (David, Emily) or (Emily, David). Alex can't be next to David, so Alex must be at one end.