Number Riddle

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

Number Riddle




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If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

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A detective visits his friend John just to discover that John's neighbour Dr Jacob was murdered. Dr Jacob, who is a mathematician wrote the murderer's name in a code word "Hcqtfz". There were five suspects
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The Detective was instantly able to find the murderer.
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A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

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My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

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If nine thousand, nine hundred nine dollars is written as $9,909,
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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.