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

There are six people in a family namely M, N, O, P, Q and R.

R and O are brother and sister.

N is the brother of Q's husband.
P is the father of M and grandfather of R.

How many male members are in the family?

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?

If a zookeeper had 100 pairs of animals in her zoo, and two pairs of babies are born for each one of the original animals, then (sadly) 23 animals don’t survive, how many animals do you have left in total?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

Which of the following words don't belong in the group and why?
CORSET, COSTER, SECTOR, ESCORT, COURTS

Solve the mathematical equation in the picture below.

Paul's height is six feet, he's an assistant at a butcher's shop and wears size 9 shoes. What does he weigh?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.