# Study sets matching "gmat math review"

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Dividing by 5

double and halving

squaring shortcuts

doubling an area of a square and how to…

1. if a number is divisible by 5 you can always multiply it by…

1. if you have 2 numbers that need to be multiplied and one is…

1. multiples of ten are easy. you just multiply the base unit…

Mupltiply the origional sum by 8 which is 2^3

Dividing by 5

1. if a number is divisible by 5 you can always multiply it by…

double and halving

1. if you have 2 numbers that need to be multiplied and one is…

Compound Interest

Area of a Triangle

Area of a circle

Find the original price if given the to…

Compound interest is interest calculated on the initial princi…

The area of a triangle is 1/2bh

The area of a circle is pi x radius squared

X= Original Price = 100%... New Price/X+Percentage= X... Example: T…

Compound Interest

Compound interest is interest calculated on the initial princi…

Area of a Triangle

The area of a triangle is 1/2bh

Integer... Positive Integer / Negative Int…

Sum of the angles of a triangle is?

a - b = - (b - a)

Multiples

is a number that can be written without a fractional component…

180

...

Multiple of 3 are 3 (=3

**1), 6 (=3**2), 9(=3**3), 12(=3**4), e…Integer... Positive Integer / Negative Int…

is a number that can be written without a fractional component…

Sum of the angles of a triangle is?

180

Absolute Value

General rule about variables

0^x

1^x

-Generally have two solutions... -+/-... -isolate expression in brac…

if you need to solve for n variables you need n equations

0

1

Absolute Value

-Generally have two solutions... -+/-... -isolate expression in brac…

General rule about variables

if you need to solve for n variables you need n equations

P.E.M.D.A.S.

Numerator

Denominator

Mixed Number

Rule for Order of Operations.... Order = P > E > M & D (L to R) >…

Top # of a fraction = "part".

Bottom # of a fraction = "whole".

Number made up of both an integer and a fraction.

P.E.M.D.A.S.

Rule for Order of Operations.... Order = P > E > M & D (L to R) >…

Numerator

Top # of a fraction = "part".

Quadratic Formula

Simple Interest

Annual Compound Interest

Compound Interest

ax2 + bx + c = 0.

P

**r**t... P = starting principle; r = annual interest rate; t = nu…P(1+r)t... P = starting principle; r = annual interest rate; t =…

P(1 + r/x)xt ... P = starting principle; r = annual interest rate…

Quadratic Formula

ax2 + bx + c = 0.

Simple Interest

P

**r**t... P = starting principle; r = annual interest rate; t = nu…absolute value

3

positive

2.5

the distance between a number and zero on the # line

What is the absolute value for both 3 and -3?

absolute value of any nonzero number is always?

250% can be re-written in decimal format as?

absolute value

the distance between a number and zero on the # line

3

What is the absolute value for both 3 and -3?

standard deviation

formula for solving: S = {A, B, C, D, E…

exponent rules: (x^r)(x^s) =

exponent rules: (x^r)/(x^s) =

1) calculate the mean... 2) find the difference between the mean…

n! / (k!(n-k)!)... =5! / (2!*3!)... =120 / 12... =10

x^(r+s)

x^(r-s)

standard deviation

1) calculate the mean... 2) find the difference between the mean…

formula for solving: S = {A, B, C, D, E…

n! / (k!(n-k)!)... =5! / (2!*3!)... =120 / 12... =10

Integer

Prime number

Factor/Divisor

Quotient

Whole number (not fraction)

Positive number can only be divided by self and 1

Number that can be divided into another number

How many timex a number can be divided into another

Integer

Whole number (not fraction)

Prime number

Positive number can only be divided by self and 1

0!

P(E)

P(E) = # of outcomes/ total # of possib…

Rules of Exponents

1! = 1

the probability that an event occurs, a number between 0 and 1…

P({1,3,5}) = |{1,3,5}|/6 = 3/6 = 2

Where "x" and "y" are any positive number, and "r" and "s" are…

0!

1! = 1

P(E)

the probability that an event occurs, a number between 0 and 1…