Which tank will fill first?

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?

I went to the bookshop and spent one-half of the money that was in my purse.

When I came out, I found that I had as many cents as I had dollars and half as many dollars as I had cents when I went in. Find the money in my purse when I entered the store.

Distances from you to certain cities are written below.

BERLIN 200 miles

PARIS 300 miles

ROME 400 milesAMSTERDAM 300 miles

CARDIFF ??? miles

How far should it be to Cardiff ?

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

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

I look at you, you look at me, I raise my right, you raise your left. What am I?

What is red and smells like blue paint?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.