I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

O_er_t_o_

Complete the missing letters of the given word.

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

What can you deduce from the following BrainBat?

CRY
LMKI

A man is lying dead in a field where no one is around. His head is split open and his legs are disfigured. Near to him, there is an unopened package. No living organism can be found anywhere at the crime scene.

How did he die?

If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.

Can you find out which number multiplied by itself will give the output as 12345678987654321?

What have one eye but still cannot see?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

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?