It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?

What goes through cities and fields, but never moves?

What building has the most stories?

What number divided by 4 is the same as that number minus 4?

I know a nine-letter word having only one vowel.
Do you ?

What always comes into a house through the keyhole?

What is so fragile that saying its name breaks it?