It has five wheels, though often think four, You cannot use it without that one more, You can put things in it, you can strap things on top, You can't find it in the market, but you can still go shop. What is it?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

Find the missing number in the series below

13 -21 34 -55 ? -144

I am eight letters long - "12345678"
My 1234 is an atmospheric condition.
My 34567 supports a plant.
My 4567 is too appropriate.
My 45 is a friendly thank-you.
My 678 is a man's name.

What word am I?

As a whole I am both
safe and secure.

Behead me and I become
a place of meeting.

Behead me again and I am
the partner of ready.

Restore me, and I become
the domain of beasts.

What am I?

I am written with two letters.
I said with the one.
I usually am seen with the two.

Who am I?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What 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.

The more you take me, the more you leave me behind.
Who Am I?