A snail is at the bottom of a 20 meters deep pit.
Every day the snail climbs 5 meters upwards,
but at night, it slides 4 meters back downwards.
The Question is
How many days does it take before the snail reaches the top of the pit?
It will take the Snail 16 Days to reach the top of the Pit.
First 15 Days it will reach at 15Mtrs and on the 16th day it will reach the top.