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Math Formulas for GRE
n/a
12
Mathematics
Graduate
12/25/2011

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Cards

Term
Quadratic Formula
Definition
x = (-b +/- [the square of root of b squared minus 4ac])/ 2a
Term
Area of sector
Definition
n/360 x (pi)(r squared)
Term
Sum of all angles of a regular polygon
Definition
(n - 2) x 180
Term
Length of an arc
Definition
n/360 x 2(pi)(r)
Term
Volume of a rectangular solid
Definition
Length x width x height
Term
Surface area of a rectangular solid
Definition
2(lw) + 2(wh) + 2(lh)
Term
Volume of a cylinder
Definition
(pi)(r squared)(h)
Term
Surface area of a cylinder
Definition
2(pi)(r squared) + 2(pi)(r)(h)
Term
Permutation of a smaller group
Definition
n!/(n-k)!
Term
Combination
Definition
n!/(k!)(n-k)!
Term
Simple Interest
Definition
(principal) x (interest rate) x (time)
Term
Compound Interest
Definition
Final balance = (principal) x (1 + interest rate/C) raised to (time)(C)

C is the number of times compounded anually
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