Why are all black people so quick ?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

There are two dice with empty faces in front of you and a marker. You can mark any number on each of the faces of the two dice, but you have to display all 31 days of the month using the two of them.

Which numbers will you mark on which dice so that you can easily depict all the dates of the month?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

Be active and find the killer in the picture Riddle below.

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

I have branches, but no fruit, trunk or leaves. What am I?

Can it be possible to build a house that has all its four walls facing towards the South?

A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.

Below rebus represent famous DiCaprio movie. Can you name it?