Building Puzzle

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?




Similar Riddles

Can you count the number of quadrilaterals in the picture below?

Count the Quadrilaterals

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Can you discover the missing number in this series?

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96, 15, 87
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How many times in a given day, minutes and hour clock comes in a straight line ?

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John speaks the truth only once a day in a week. Below are a few hints for you:

First: Days are Sunday, Monday and so on.
Second: One day he says, "I lie on Monday and Tuesday".
Third: On the next day, he says, "Today is either Thursday, Saturday or Sunday".
Fourth: On the next day, he says, "I lie on Wednesday and Friday".

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Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

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Can you identify the famous TV character from the rebus below?

Uncover TV character

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In a mathematical quiz, you are asked the following question:

Use three 9s in a mathematical expression without dividing or multiplying to form the number one.

Can you answer the question?

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A game is being played where eight players can last for thirty-five minutes. Six substitutes alternate with each player in this game. Thus, all players are on the pitch for the same amount of time including the substitutes.

For how long is each player on the pitch?

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You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

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An express train takes 3 seconds to enter the tunnel which is 1 km long.
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Amazing Facts

Crossword

The day before the 1996 U.S. presidential election, the NYT Crossword contained the clue “Lead story in tomorrow’s newspaper,” the puzzle was built so that both electoral outcomes were correct answers, requiring 7 other clues to have dual responses.