I am white when I am dirty, and black when I am clean. What am I?

Aaron, Brad, Christopher, Danny and Elvis decided to play a game of tiddlywinks. In this game they decided that one win will get 1 point for winning, 0 for losing and 1/2 in case of a tie.

They finished the game in alphabetical order and it was found that the scores were different for each person.

Based on the following two statements, can you find out the result of the individual games?
Brad: No one could finish like me, without a loss.
Elvis: No one played worse than me, I finished without a single win.

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

Solve the equation in the image by looking at the pattern closely.

What does this rebus riddle means ?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

What goes up but never comes down?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

Replace the question mark with the correct number in the below-given picture?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M