In a certain city in the Philippines, all seven-digit telephone numbers begin with 350. How many telephone numbers may be assigned to that city if the last four digits should not begin or end in zero?

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Q: In a certain city in the Philippines, all seven-digit telephone numbers begin with 350. How many…

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Q: How many telephone numbers have no repeated digits?

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Q: Suppose that the average attendance for 9 Major League Baseball teams is 35,687.5 people per game.…

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Q: It is desired to write a 3-digit number using the numbers 2, 3, 4, 5, 6. If each number is used only…

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Q: If a number is divisible by 121, is it divisible by 11?

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Q: Astronomers have estimated that the Milky Way galaxy contains 100 billion stars. Express this number…

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Q: How many different codes are​ available?

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