Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

What does a man do only once in his lifetime, but women do once a year after they are 29?

A boy and his father are caught in a traffic accident, and the father dies. Immediately the boy is rushed to a hospital, suffering from injuries. But the attending surgeon at the hospital, upon seeing the boy, says 'I cannot operate. This boy is my son.' How is this situation explained?

I get hot but I never sweat,
I cook food but I am not a chef,
I have a door but you can't enter me,
I have a light but I am not a lamp.
Who am I?

The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

P is the father of Q and S is the son of R. T is the brother of P and has a daughter U. If R is the sister of P, then what is the relation between U, Q and S?

Can you count the number of quadrilaterals in the picture below?