No one wants to have it, but if one got it, he does not want to lose it. What is It?

There was a blind man. He had four socks in his drawer either black or white. He opened it and took out two socks. Now the probability that it was a pair of white socks is 1/2.

Can you find out the probability that he had taken out a pair of black socks ?

Out of the nine cats that you can see in the picture, there are only two that are completely identical. Can you find them out?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

You see me once in June, twice in November, and not at all in May. What am I?

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

There's a day, that comes around once a year.
To celebrate the man, you hold dear.
He gave you life, love and will pick you up if you fall.
When it comes to guys like him, He's the best of all.
Who is he?

I cannot talk, but I always reply when spoken to. What am I?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

How do you go from 98 to 720 using just one letter?