If you say my name, I will no longer exist. What am I?

It is a nine-letter word.
The exact opposite of the phrase "friendly and outgoing"
It contains the word "over".
It starts will a vowel.

What is it?

What 5-letter word typed in all capital letters can be read the same upside down?

If an electric train is travelling south, then which way is the smoke going?

I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?

How can you take 2 from 5 and leave 4?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

How can one talk without saying a single word?

The more of this there is, the less you see. What is it?

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?