Our product and our sum always give the same answer. Who are we?

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?

Which wheel of car does not rotate when you turn your car right?

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

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?

You order chicken wings at KFC in the boxes of 6, 9 and 20. What is the largest number of wings that you cannot obtain by buying in any combination of the boxes?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

You are provided with a grid (as shown in the picture). Can you fill the squares with numbers 1-8 in a manner that none of the two consecutive numbers are placed next to each other in any direction (vertically, horizontally or diagonally?)