Can you replace the question mark with the correct letter?

6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?

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?

In the image below, can you find the value of an angle(y)

What can you catch but never throw?

In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

I shave every day, but my beard stays the same. What am I?

If 21x = 79x, what is the value of x?

Why is it against the law for a man living in Delhi to be buried in Mumbai?

What is the next number in this matchsticks series riddle?