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

Okay before we begin with the puzzle, do keep in mind that you have to answer it quickly.

You are participating in a car race. Seeking the perfect moment, you overtake the second person in the race. What positions are you in now?

Only Highly Attentive Can Spot The Ladder In This Library In 7 Seconds! Can You?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

A boy purchased a book from a bookkeeper and gave him $100.
The cost of the book is $50 but the bookkeeper has no change, so he gets the change from the next shop and returns the boy his $50.

After some time the next shopkeeper came with the $100 note and told the bookkeeper that the note was a fraud, so he took the money back.

How much loss did the bookkeeper face?

A bank customer had $100 in his account. He then made 6 withdrawals. He kept a record of these withdrawals, and the balance remaining in the account, as follows:

Withdrawals Balance left
$50 $50
$25 $25
$10 $15
$8 $7
$5 $2
$2 $0
----- -----
$100 $99

Why are the Totals not tallying?

Which tank will fill first?

What does below chemistry rebus means?

Prove that the below maths equation is true.

8 + 8 = 91