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

Considering the below equation:

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

Then, I + II + III = ?

What number should come in place of the question mark below?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

Can you write down eight eights so that they add up to one thousand?

Can you name some countries which do not have the alphabet 'A' in them?

You can see it everyday, But cannot touch it at will. What is it?

I want to fill my bucket using both cold and hot water.
I have two taps for both cold and hot water. The hot water tap fills the bucket in exact 6 hours and the cold water tap fills the bucket in exact 4 hours.
I turn both of them simultaneously but I forgot to turn off another tap which removes the water out of the bucket. This tap can empty the bucket in 12 hours.

How Long will it take to fill the bucket?

In the picture given below, can you find out which digit will take place of the question mark?

The following sentence is false. The preceding sentence is true.
Are these two sentences true or false?