Who always enjoys poor health?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

In a science lab, a petri dish hosts a healthy colony of yeast for an experiment. Now every minute, all the yeast cells divide into two. At noon, there was just a single cell of yeast and at 1:22, the Petri dish was half full. Can you calculate when the dish will be full of yeast?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

I shave every day, but my beard stays the same. What am I?

Write the next letter in this sequence.
O, T, T, F, F, S, S, E, __
**Hint: It is a Number Series Puzzle

Two-person want to cross a river. Only one boat is present on the riverside that can carry only one person at a time.

However, they still manage to cross the river. How is it possible?

A train leaves from point A for point B at 80 mph. After half an hour, another train leaves from point B for point A at 60 mph.

Which of the trains will be farther from point A when they meet ?