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

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

By using 'because' continuously three times, can you make an English statement ?

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

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?

A man has to get a fox, a chicken, and a sack of corn across a river.

He has a rowboat, and it can only carry him and one other thing.
If the fox and the chicken are left together, the fox will eat the chicken.
If the chicken and the corn are left together, the chicken will eat the corn.

How does the man do it?

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

The teacher told the student that if he told a lie then he will be expelled from school and if he told the truth then he still is expelled from school.

What can a student say to prevent his being expelled from school?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??