Replace the question mark with the correct number below.

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

An American nightclub called 'The Coconut Grove' had a terrible fire in which over 400 people died. A simple design flaw in the building led to a high death toll. Subsequently, regulations were changed to ensure that all public buildings throughout the country eliminated this one detail, which proved deadly. What was it?

A father is locked up in jail. His wife has gone bankrupt. Their male child has to sell his hotel in order to gain some money. Yet their girl child does not care and is quite happy.

How can someone be so rude?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

Why do you find that most of the buildings are deprived of the 13th floor?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?