Consider a well of 116 meter depth and a frog at the bottom of the well. It climbs 9 meter in day time and slides down 5 meter during night. How many days it needs to climb out of the well?

4 meters a day, after 27 days it will make 27*4=108 and the next day it will be out of the well. So totally 28 days

A frog is at the bottom of the well which is 20 meters deep. Everyday the frog jumps 5 meters upwards and fall 4 meters down. How many days it will take for the frog to reach the top?

A man accidentally fell in a 30m well. His friend gave him a rope. The man was able to climb 3 metres, but slipped back 2 metres in 5 minutes. How much time will he take to climb up the well?

I am always trapped in a glass cage.

I usually just sit at the bottom of the cage,

But I climb higher when I get hotter &

Climb down when things get cooler.

What am I?