# Study sets matching "gmat math knotes"

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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…

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

Find the calues of a and b that satisfy…

A 9th grade class has 20 students. 11 s…

A sheet of iron in the form of a sector…

Two pple take 6 days to plow a piece of…

a = 3/7, b = -1/7

v = 11, b only = 4, ... soccer only + soccer and basketball = ... 2…

Let R be the radius of the sector and r radius of the base of…

Let the pple be A and B. ... Let A take 14 days. in one day , a…

Find the calues of a and b that satisfy…

a = 3/7, b = -1/7

A 9th grade class has 20 students. 11 s…

v = 11, b only = 4, ... soccer only + soccer and basketball = ... 2…

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…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.