What building has the most stories?

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

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

What has lots of eyes, but can’t see?

Can you tell a 3D object that has just two surfaces?

Find out which of the given views in the picture is accurately the top view of the given pyramid.

Open a Laptop which is password protected. Hint for the password is given as below:

1 mobile 3 books 2 Boards 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches

After undergoing a successful eye operation, A blind girl has just boarded a train to her home. The doctor asked her to open the bandages after 3 hours. On her train journey, she opened the bandages and within a fraction of the time she commits suicide by jumping off the train.

Though her operation was successful, Why did she commit suicide?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

Find the smallest sentence with all the English alphabet.