A guard is positioned at the one side of bridge say ‘A’.
– His task is to shoot all those who try to leave from ‘A’ to other side say ‘B’.
– He also need to welcome the person who come from other side ‘B’ to his side ‘A’.
The guard comes out of his post every 1 hour and looks down the bridge for any people trying to leave.

You are at side ‘A’ and wish to go to other side ‘B’. you also know that it would take 1:45 hr to cross the bridge.
How will you cross the bridge ?