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?

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

Can it be possible to build a house that has all its four walls facing towards the South?

A lily pad doubles in size every day. If on the 60th day, the pond is exactly filled with the lily pad, on what day is the pond exactly half covered?

What begins with T, ends with T, and has T in it?

Find the value of "a" by solving the maths equation in the picture below:

What four weights can be used to balance from 1 to 30 pounds?

What breaks yet never falls, and what falls yet never breaks?

Solve the following series:
AZ, GT, MN, __, YB

The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?