Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

What breaks yet never falls, and what falls yet never breaks?

I know a nine-letter word having only one vowel.
Do you ?

I am the fastest animal but cannot climb the tree. What am I?

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

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?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

Why 1729 is a magic number? Answer Logically.