There are two sand clocks(timers) one complete totally in 7
minutes and other in 9-minutes we have to calculate with
this timers and bang the bell after completion of 11-
minutes!plz give me the solution.
There will be two security guards at hell and heaven. hell
guy used to speak lie always and we can ask one and only
one question to move into heaven(twist is we don't know who
is hell or heaven gaurd).how can we move into heaven?