You along with your friend are standing in front of two houses. Each of those houses inhabits a family with two children.

Your friend tells you the below two facts:
1) On your left is a family that has a boy who likes accounts but the other child loves science.
2) On the right is a family with a seven-year-old boy and a newborn baby.

You ask him, "Does either of the family have a girl?"

To this, he replies, "I am not quite sure. But can you guess that? If you are right, I will give you $500."

Which family do you think is likely to have a girl?

Why is a river so rich ?

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

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

They are three errirs in this question. Can you find them?

You are on a Boat in the mid of a river. You have two cigarettes with you. One of these two you have to light, how will you light the cigarette?

What makes this number unique: 8,549,176,320?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

You can see it everyday, But cannot touch it at will. What is it?