Can you make four (4) nines (9) equal 100?

Here is a conversation between a couple who both are software professionals.

Husband: Hey! What is your date of birth?
Wife Replied Angrily: It is 591062400
Husband after doing some calculations replied, "Got It".

What is the DOB of the wife?

There is something which is always coming but never arrives?

I organized a small get together at my home.
In the party , i have a barrel with some whiskey in it.

Suddenly Guest 1 say 'I bet this barrel of whiskey is more than half full'.
'No, it's less than half full' Guest 2 replied.

I don't have any measuring instrument and without removing whiskey from it , how can i determine which of the guest is right ?

Replace the question mark with the correct number in the below-given picture?

Find the number of squares in the below-given picture.

Can you solve below mathematical equation?

2^1234 - 2^1233

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

How many letters are in the alphabet?

When I asked a girl's name she told me her name is the date '07/09/2001'.

I thought for a few seconds and then I got her name. Do you?