Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Which Burger Is Different in below image?

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 word begins and ends with an E, but has only one letter?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

What has many keys but can’t open a single lock?

The dirtier I get, the whiter I look. Who am I?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?