Can you replace the question mark with the correct number?

It begins where the time ends.
Its second is an expression of surprise.
Its third is a question.
Its fourth is urinate.
It ends with a drink.

Which country it is?

Find the missing letter in the last circle logically in the given below picture.

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

P is the father of Q and S is the son of R. T is the brother of P and has a daughter U. If R is the sister of P, then what is the relation between U, Q and S?

A four-digit number (not beginning with 0) can be represented by ABCD. There is one number such that ABCD=A^B*C^D, where A^B means A raised to the B power. Can you find it?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

What number should come in place of the question mark below?

A chess tournament is taking place on knock-out terms (the one who loses the match is out of the game).
(a) If 10 matches are played in total, how many players participated?
(b) If 20 players took part in the tournament, how many matches were played?