You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

In a school, 280 students studied chemistry, 254 students studied physics and 280 students studied biology.

97 students studied chemistry as well as physics, 138 students studied physics as well as biology and 152 students studied chemistry as well as biology.

73 students studied all the three branches.

Can you find out the total number of students?

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

What have one eye but still cannot see?

Can you find the mistake in the below statement?

It belongs to you, but other people use it more than you do. What is it?

I have no life, but I can die. What am I?

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