Why are all black people so quick ?

Can you name four days which start with the letter 'T'?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

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

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Look at the picture and find out which square is not linked with any of the other squares.