A father's child, a mother's child, yet no one's son.

Who am I?

Why is 6 afraid of 7?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

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

Which Burger Is Different in below image?

Can you count the number of triangles in the given picture?

Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?

Alex is stranded on an island covered in forest.
One day, when the wind is blowing from the west, lightning strikes the west end of the island and sets fire to the forest. The fire is very violent, burning everything in its path, and without intervention the fire will burn the whole island, killing the man in the process.

There are cliffs around the island, so he cannot jump off.

How can the Alex survive the fire? (There are no buckets or any other means to put out the fire)

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?