What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

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?

What Time Should the last watch show in the below figure?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

The following question it puts forth you:

25 - 55 + (85 + 65) = ?

Then, you are told that even though you might think it's wrong, the correct answer is actually 5!

Whats your reaction to it? How can this be true?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

Intelligence Agency need to break the vault but the problem is that they are not able to break the vault.

On the vault, a text is written as:

31 11 33 33 43 45
21 25
31 24 11 31 51 41

To Break the code Intelligence Agency brings a mathematician named Joseph.
Minutes later he deciphers the code.

Whats the code?

There are two guys standing face to face in a room. On a wall, there is a clock. One of those is a prophet. He tells the other guy that he will be stabbed in the back in five minutes.

Shocked to hear that, the other guy stares at the clock. Just after the five minutes, he is stabbed on the back. Can you tell what happened?