I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

Solve the following series:
AZ, GT, MN, __, YB

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

our enemy challenges you to play Russian Roulette with a 6-cylinder pistol (meaning it has room for 6 bullets). He puts 2 bullets into the gun in consecutive slots, and leaves the next four slots blank. He spins the barrel and hands you the gun. You point the gun at yourself and pull the trigger. It doesn't go off. Your enemy tells you that you need to pull the trigger one more time, and that you can choose to either spin the barrel at random, or not, before pulling the trigger again. Spinning the barrel will position the barrel in a random position.

Assuming you'd like to live, should you spin the barrel or not before pulling the trigger again?

Why is 6 afraid of 7?

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

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

Jenifer is learning to drive her car. She went down a one way lane and in the wrong direction. But she do not break any law.

How come ?

How can a man go eight days without sleep?