It belongs to you, but other people use it more than you do. What is it?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

How many letters are in the alphabet?

What do you get if you add 2 to 100 four times?

There was a man he lives in a hotel each morning he presses the first floor button each evening if there is a person in the elevator he asks him to press the 10 floor button if there is no one in the elevator he takes the stairs why.

what does this below rebus represent identXQQQQQME

On 26-01-2022, Juli was murdered at her house in a city in India in the afternoon. There were three suspects in the murder and the following are the statements that were given by them:

John: I visited my village that day.
Jacob: I was out to deposit my house tax in the municipality office at that time.
Jonny: I was at a friend's place having lunch at that time.

Can you find out who is the murderer?

I have branches, but no fruit, trunk or leaves. What am I?

Outside a tattoo artist's shop, there was a signboard which read 'I make tattoos on only them who do not tattoo themselves'.

Reading it what do you think, does the tattoo artist tattoo himself?