Can you convert the number zero(0) into a positive number using just one mathematical operator ?

What's the next in the series?

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

What do you call a fish without an eye?

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

The Federal bank of London is abducted by the robbers. The head of the robbers asked the cashier to empty their money vault to them and when suddenly cashier got a call from her father. To avoid any suspicion, the robber asked the cashier to pick the call and reply her father in the shortest manner possible.

The cashier told her father "Is there an emergency father, Call me when you are free and I will help you in your furnishing" and then the cashier hung up the phone.

After 10 minutes, police arrived at the crime scene.

How did the police know about the robbery?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

Why is the Hole below a Lock?

There is a certain crime, that if it is attempted, is punishable, but if it is committed, is not punishable. What is the crime?

Forwards I am heavy, backward I am not. What am I?

Write the next letter in this sequence.
O, T, T, F, F, S, S, E, __
**Hint: It is a Number Series Puzzle