Why are all black people so quick ?

Considering the below equation:

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

Then, I + II + III = ?

Find the combined weight of the Cat, Dog and Rabbit in the given picture.

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

A donkey is behind another donkey
I'm behind that second donkey
But there is a whole nation behind me

It is a murder you can describe in a word.

Which is faster, Heat or Cold ? Explain.

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not-rounded numerals equals 24.

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

I can write cow in 13 letters.

Can You?

I have Rs.50 and I spend it in the way as below.