If there are an even number of terms, the median will be halfway between the two terms closest to the middle. The number that evenly divides the terms in two groups.
What is the value of the hypotenuse of a right triangle with sides equal to 9 and 12? (Arc = fraction of a circle's circumference)
GRE MATH FLASH CARDS HOW TO
HOW TO FIND ONE ANGLE OF A REGULAR POLYGONĭegree measure of one angle in a regular polygon with n sides: Sum of the interior angles in a polygon with n sides: SUM OF ALL THE ANGLES OF A REGULAR POLYGON How to ADD, SUBTRACT, MULTIPLY, and DIVIDE ROOTS HOW TO RAISE A POWER TO A POWER TO AN EXPONENTĪ number raised to the exponent -x is the reciprocal of that number raised to the exponent x.įractional exponents relate to square roots. The greater the spread, the higher the standard deviation. Standard deviation is a measure of how spread out a set of numbers is (how much the numbers deviate from the mean). Probability = number of desired outcomes / number of possible outcomes Probability (when all outcomes are equally likely) How many possible outcomes for gold, silver, and bronze medal winners are there? The runners who come in first, second and third place will win gold, silver and bronze medals respectively.
OR if the number of ways to arrange a smaller group drawn from a larger group:įive runners run in a race. How many ways are there to arrange 7 items along a shelf? = 7! Number deleted = (original sum) - (new sum) Number added = (new sum) - (original sum) How to use the ORIGINAL AVERAGE and NEW AVERAGE to figure out WHAT WAS ADDED OR DELETED (final balance) = (principal) x (1+ interest/c) (time)(c) Interest = (principal) x (interest rate*) x (time**)Ĭompound interest (e.g. How to solve a group problem involving BOTH/NEITHERĪ & b = number of hours takes people to complete task Slope = rise/run = change in y / change in x Three equal sides and three 60 degree anglesĬorresponding angles are equal and corresponding sides and proportional.Īrea = (average of parallel sides) x (height)
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