What's the next in the series?

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

What is always in front of you but can’t be seen?

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?

I am an eight letter word and I am a computer terminology.
The second, third and fourth letters make an animal.
The fourth, fifth, sixth, seventh and eighth letters make a weapon.
The first, second, third and fourth letters can be taken as an outcome of any exam.
The fifth, sixth, seventh and eighth letter combine to form a high end typing software.

Can you tell who am I ?

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat

What do you call a fish without an eye?

If two fifty-foot ropes are suspended from a forty-foot ceiling that is twenty feet apart, how much rope will you be able to steal if you have a knife?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

Our product and our sum always give the same answer. Who are we?

Can you solve the maths in the below-given picture equation?