What is the longest word in the dictionary?

In an interview, a boy was asked an unusual question 'How two persons sitting with a table in between them can't see each other?' He was unable to reply. Can you?

Replace the question mark with the correct number in below Picture:

In a mathematical quiz, you are asked the following question:

Use three 9s in a mathematical expression without dividing or multiplying to form the number one.

Can you answer the question?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

A blonde put eyeliner on her head. Why?

A boy was locked in a room by some robbers. All that is in the room is a piano, a calendar, and a bed. The room is locked from the outside. What does he eat, drink, and how does he escape and get out?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

At my favorite fruit stand,
an orange costs 18,
a pineapple costs 27,
and a grape costs 15.
Using the same logic, can you tell how much a mango costs?

What occurs twice in a week, once in a year but never in a day?