With the help clues provided in the image, can you find the 5 digit key?

Can you solve the maths in the below-given picture equation?

Can you make four (4) nines (9) equal 100?

A lion and its tamer are standing inside a cage that measures 1 unit in radius. Both of them can effortlessly run at the speed of 1 unit maximum.

1) Suppose the lion is hungry, will he be able to eat up the tamer?
2) If yes, how long can the tamer survive?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

15 caves are arranged in a circle at the temple of doom. One of these caves has the treasure of gems and wealth. Each day the treasure keepers can move the treasure to an adjacent cave or can keep it in the same cave. Every day two treasure seekers visit the place and have enough time to enter any two caves of their choice.

How do the treasure seekers ensure that they find the treasure in the minimum number of possible days?

Speaking of rivers, a man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Identify the next two numbers in this series.

101, 112, 131, 415, 161, 718, ???, ???

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?