Which is heavier: a ton of bricks or a ton of feathers?

Which city is three-fifths chick two third cat and 50% goat?

It is always ahead of me yet I can never see it. What is it?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

Which is the smallest number that you can write using all the vowels exactly once?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?