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 * Mean** - To find the mean you must add up all the numbers in a set of data then divide by how many pieces of data. This is usually the average also called the arithmetic mode.
 * Median -** The number in the middle of the set of data that are arranged in order. When there are two middle numbers you add the two numbers together and divide the answer by two.
 * Mode** - The mode is the number that shows up the most. You can have more than one mode.

6,12,12,3,40,25,3,17
 * Find the mean, median and mode for this set of data.**

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A perfect square is a square that has the same whole number for all sides. A square root is a number multiplied by itself.
 * Perfect Square Definition**
 * Square Root Definition**


 * What is the square root of 49?**

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Is taking off 15% a given item and then an additional 10% off the reduced price the same as taking 25% off of the original price? Why or Why not?
 * Percent**

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 * Ratio Proportion Questions**

1. Suppose you have a photograph that is 15 cm wide and 25 cm long. If you doubled the width to 30 cm and you wanted it to be similar what is the new length?

2. 19,548 books fit on a wall of the new Alexandrian Library. There are 6 bookshelves on the wall and every bookshelf holds the same number of books. Supposing that another wall has 13 bookshelves how many books can it hold?

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