What work can one never finish?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation. Conditions: Each must be used exactly once and no other numbers or symbols can be used.

What is the next number in this matchsticks series riddle?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

When 99 is considered higher than 100?

How could a baby fall out of a twenty-story building onto the ground and live?

Count the Triangle in the figure given below:

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?