I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

What can you deduce from the following BrainBat?

CRY
LMKI

What's a single-digit number with no value?

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

How is a fly different from a mosquito?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?