Take away the whole and some still remain. What is it?

Christina is practising her dance steps along with her friends. In a particular sequence, all of them form a row. At that point, Niharika is standing in the 4th position from either end of the row.
Can you find out how many girls are practising together?

'Ferrari driver' easily beats the 'force driver' in a two-car race. How did Indian newspapers truthfully report so to look as a 'force drive' had outdone the 'Ferrari driver'? Think!!!

How can a man go eight days without sleep?

I travel all around the world but always stay in the corner. What am I?

Find the Goldfish below the given Image.

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

Prove that the below maths equation is true.

8 + 8 = 91

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

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?