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

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

A chess tournament is taking place on knock-out terms (the one who loses the match is out of the game).
(a) If 10 matches are played in total, how many players participated?
(b) If 20 players took part in the tournament, how many matches were played?

What is the below Rebus indicate?

I am a word that begins with the letter “i.” If you add the letter “a” to me, I become a new word with a different meaning, but that sounds exactly the same. What word am I?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

Solve the below puzzle by replacing the question mark with the correct number.

3 6 12

4 8 16

5 10 ?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

What work can one never finish?

What does below pictogram mean?