# Study sets matching "gmat math review"

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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

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…

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…central angle

inscribed angle

sector

Tangent Meets Radius

an angle that touches the center of a circle

an angle that touches the perimeter of a circle

two radii plus an arch

Forms a right angle

central angle

an angle that touches the center of a circle

inscribed angle

an angle that touches the perimeter of a circle

Standard deviation

Event A and Event B formula

Event A or Event B formula

Permutation Formula

1. find the mean... 2. for each number in the set find the difere…

Probability of A X Probability of B

Probability of A + Probability of B

nPr = n!/n-r!

Standard deviation

1. find the mean... 2. for each number in the set find the difere…

Event A and Event B formula

Probability of A X Probability of B

Multiplying Like Bases

Dividing Like Bases

Quotient to a Power

Product to a Power

Keep the base - add the exponents.

Keep the base - subtract the exponents.

"distribute" exponent to everything inside

"distribute" exponent to everything inside

Multiplying Like Bases

Keep the base - add the exponents.

Dividing Like Bases

Keep the base - subtract the exponents.

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Common Factors

Gross Profit

Combined Events

Multiplication Principle

Break down both numbers to their prime factors to see what fac…

Gross profit = Selling Price - Cost

For events E and F:... • not E = P(not E) = 1 - P(E)... • E or F = P…

The number of ways independent events can occur together can b…

Common Factors

Break down both numbers to their prime factors to see what fac…

Gross Profit

Gross profit = Selling Price - Cost

If A is sufficient then

If A is insufficient then

In Yes/No Data Sufficiency Question sta…

Guessing on Data Sufficiency Questions

Answer is A or D

Answer is B, C or E

It is sufficient

-Don't Choose E if you have to guess... -Pick between A or C if y…

If A is sufficient then

Answer is A or D

If A is insufficient then

Answer is B, C or E

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?