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Mean and Standard Deviation

If the mean and standard deviation of the data set {12,14,19,x} are 15 and √26, respectively, x = ?

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Average Height

If the heights of three people are 5’8”, 5’2”, and 6’2”, what is their average height?

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Ace of Spades

A standard deck of 52 cards contains 13 cards each from the four suits: spades, clubs, diamonds and hearts. If two cards are randomly picked without replacement, what is the probability that they are both diamonds?

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Office Space

If 3 out of every 8 people in an office are women, what is the ratio of men to women?

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Wrath of the Math

25x is to 40y as 25y is to what?

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Book Organization

In how many different orders can six books be organized in a shelf?

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Normal Distribution Percentages

In the normal distribution, what percentage of scores fall within one standard deviation of the mean?

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I Know Kung Fu

What is the ratio of the number of composite integers to the number of prime integers in the interval [1,10]?

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Describe the Data

Given the following data, which of the following terms best describes the data?

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Intelligent Doodles

A friend of yours draws a circle circumscribing a regular octagon. What is the ratio of the area of the octagon to the circle?

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