I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

The following sentence is false. The preceding sentence is true.
Are these two sentences true or false?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

I get hot but I never sweat,
I cook food but I am not a chef,
I have a door but you can't enter me,
I have a light but I am not a lamp.
Who am I?

What always comes into a house through the keyhole?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

What does below Rebus mean ?

esgg sgeg gegs gsge

All of the flowers I have are orchids except two. All of the flowers I have are hibiscuses except two. All of the flowers I have are roses except two.

Can you tell me how many flowers I have?