What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

Can you count the number of triangles inside a triangle?

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?

When 99 is considered higher than 100?

On a charity event in Russia, Murray beat Djokovic by winning six games and losing three games.
Note: There is a total of 5 service breaks(one who serve lost the game).
Who served first, Djokovic or Murray?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

If eleven plus two equals one, what does nine plus five equal?

What occurs twice in a week, once in a year but never in a day?

Can you make four (4) nines (9) equal 100?

Which tank will fill first?