Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

You can see it everyday, But cannot touch it at will. What is it?

Can you count the number of triangles in the given picture?

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

There are forty elephants and they have forty-fore heads. How can this be possible?

What can you hold in your right hand, but never in your left hand?

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?