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GRE Formulas
Good formulas to know for the revised GRE quant section
26
Other
Undergraduate 4
10/15/2016
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Term
Simple Interest
 Definition
V = P(1 + (rt/100))
Term
Compound Interest
 Definition
V = P(1 + r/100^n)^nt
Term
Work Rates for combined effort
 Definition
1/T = 1/time(1) + 1/time(2)
Term
Distance
 Definition
Rate X Time
Term
Area of a Circle
 Definition
pi(r^2)
Term
Circumference of a circle
 Definition
2pi(r)
Term
Arc Length
 Definition
(x/360)2pi(r)
Term
Area of Sector
 Definition
(x/360)pi(r^2)
Term
Perimeter of Square
 Definition
4s
Term
Area of Square
 Definition
s^2
Term
Area of Rectangle
 Definition
lw
Term
Perimeter of Rectagle
 Definition
2l+2w
Term
Trapezoids
 Definition
Base1+Base2/2 X Height
Term
How to determine how many degrees a polygon has
 Definition
180(number of sides - 2)
Term
Distance Formula
 Definition
The square root of (X_2 - X_1)^2 + (y_2 - Y_1)^2
Term
1/x +1/y (ex. 1/2 + 1/5)
 Definition
X+Y/XY (2+5/2X5)
Term
Probability of an Event
 Definition
Number of ways that fit the requirement/ Number of total ways
Term
Volume of Cube
 Definition
s^3
Term
Volume of Rectangular Prism
 Definition
Side1 X Side2 X Side3
Term
Volume of a sphere
 Definition
(4/3)pi(radius^3)
Term
Combination
 Definition
Order doesn't matter; n!/r!(n-r)! where n is the number of things to choose from, and we choose r of them
Term
Permutation Repetition allowed
 Definition
Order matters; n^r where in is the number of things to choose from, and we choose r of them
Term
Permutation Repetition not allowed
 Definition
n!/(n-r)! where n is the number of things to choose from, and we choose r of them
Term
Are of Parallelogram
 Definition
baseXheight
Term
What does n and r equal in probability?
 Definition
n is the larger set and r is the smaller set
Term
Venn Diagram Formula
 Definition
A+B-Both+Neither = Total
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