White when dirty

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




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Here is a mathematical challenge that will not only engage your brain but also measure your quick-thinking abilities. If you can successfully identify the missing number in such a short span, you are demonstrating exceptional intellectual qualities.

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Which five letter word can be added at the end of below word to form a
valid word?

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Can you spot the man between the coffee bean in the picture below ?

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Rectify the following equality 101 - 102 = 1 by moving just one digit.

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John is a strange liar.

He lies on six days of the week, but on the seventh day, he always tells the truth.

He made the following statements on three successive days:

Day 1: "I lie on Monday and Tuesday."
Day 2: "Today, it"s Thursday, Saturday, or Sunday."
Day 3: "I lie on Wednesday and Friday."

On which day does John tell the truth?

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Can you find the odd number in the following five choices?

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Gambling

In Canada, a mathematical puzzle must be solved in order to win the lottery to classify it as a “game of skill” not gambling.