What word is represented by this rebus?

Why do we preferably have round manhole covers and not square ones?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

What is the next shape from answers A, B, C, and D figure?

Outside a massage parlour, there is a board that reads
"I only massage those who do not massage themselves."

Reading the above statement, does the masseur massage himself?

Do You See It?

There are three boxes on a table. One of the box contains Gold and the other two are empty. A printed message contains in each box. One of the message is true and the other two are lies.

The first box says "The Gold is not here".

The Second box says "The Gold is not here".

The Third box says "The Gold is in the Second box".

Which box has the Gold?

Buy me, smell me or deliver me, I do not change.

Who am I?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

I taste better than I can smell. Who am I?