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GRE Math
GRE Math
46
Other
Graduate
09/05/2015
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Term
Prime factorization
 Definition
Prime factorization or integer factorization of a number is the determination of the set of prime numbers which multiply together to give the original integer.
Term
Is 1 a prime factor?
 Definition
No
Term
Rational numbers
 Definition
All numbers that can be expressed as the ratio of 2 integers
Term
root 2
 Definition
1.41
Term
root 3
 Definition
1.73
Term
root 5
 Definition
2.24
Term
root 6
 Definition
2.45
Term
root 7
 Definition
2.65
Term
root 8
 Definition
2.83
Term
root 10
 Definition
3.16
Term
Compare a/b with c/d
 Definition
compare ad with bc
Term
Difference between tens and tenths digits
 Definition
tens is left of decimal, tenths right
Term
The number of decimal places in the product of two decimals
 Definition
Will be the total number of decimal places in the factors that are multiplied together.
Term
A number is divisible by 3
 Definition
If the sum of its digits is divisible by 3
Term
A number is divisible by 4
 Definition
If the last two digits are divisible by 4
Term
A number is divisible by 9
 Definition
If the sum of its digits is divisible by 9
Term
Prime numbers from 0 to 20
 Definition
2, 3, 5, 7, 11, 13, 17, 19
Term
The ratio of x to y
 Definition
x/y or x:y
Term
1/8 =
 Definition
0.12
Term
1/6 =
 Definition
0.17
Term
Expression
 Definition
one side of an equation
Term
Quadratic formula
 Definition
(-b +- sqrt(b^2 - 4ac))/2a
Term
Compound interest formula
 Definition
A = P(1 + r/c)^rc
Term
Simple interest formula
 Definition
A = P(1 + rt)
Term
How to tell if a graph is a function
 Definition
If it passes the vertical line test
Term
Slope
 Definition
change in y / change in x
Term
Perpendicular slope
 Definition
negative reciprical
Term
Vertex
 Definition
The point of intersection of an angle
Term
Supplementary angles
 Definition
180
Term
Complementary angles
 Definition
90
Term
Verticle angles
 Definition
pair of opposite angles formed by teo intersecting line segments
Term
Special right triangles
 Definition
3:4:5, 5:12:13, 1:1:sqrt2 (45:45:90 degrees), 1:sqrt3:2 (30:60:90 degrees)
Term
Regular polygon
 Definition
All sides are the same length
Term
Sum of interior angles of a polygon
 Definition
180(sides - 2)
Term
Area of a trapazoid
 Definition
(Avg of parallel sides)(height)
Term
Exterior angle
 Definition
Summpliement (180) to the interior angle
Term
Define: Permutation
 Definition
number of possible orders
Term
Formula for the number of permutations of n objects taken k at a time
 Definition
nPk=n!/(n-k)!
Term
Formula for the number of combos of n objects taken k at a time
 Definition
nCk=n!/(k!(n-k)!)
Term
4!
 Definition
24
Term
P(AnB) =
 Definition
P(A)*P(B)
Term
Is 0 an integer?
 Definition
yes
Term
Equation for the total of a group
 Definition
Total = G1 + G2 - B + N
Term
Combined work formula
 Definition
1/a + 1/b = 1/t
Term
Triangle inequality
 Definition
The sum of the lengths of any two sides of a triangle must be greater than the length of the third side.
Term
3^2 * 4^2 =
 Definition
12^2
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