#### Study sets matching "gmat math knotes"

#### Study sets matching "gmat math knotes"

Dividing by 5

double and halving

squaring shortcuts

doubling an area of a square and how t…

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

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

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 b…

double and halving

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

Compound Interest

Area of a Triangle

Area of a circle

Find the original price if given the t…

Compound interest is interest calculated on the initial princ…

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:…

Compound Interest

Compound interest is interest calculated on the initial princ…

Area of a Triangle

The area of a triangle is 1/2bh

Integer... Positive Integer / Negative In…

Sum of the angles of a triangle is?

a - b = - (b - a)

Multiples

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

180

...

Multiple of 3 are 3 (=3

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

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

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 bra…

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

0

1

Absolute Value

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

General rule about variables

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

Distance

Basic Probability Formula

Probability of Both things happening

Probability of one or the other thing…

Rate x Time = Distance

Number of outcomes you want / total number of possible outcomes

Probability A x Probability B = Both things happening

Probability A + Probability B = One or the other thing happen…

Distance

Rate x Time = Distance

Basic Probability Formula

Number of outcomes you want / total number of possible outcomes

Integer

Divisor(factor)

Multiple

Quotient

Any number in the set; A number with no fractional part.

A number that divides the integer evenly (no remainder).

The result of multiplying a number by an integer (not by a fr…

The answer after you divide one number by another

Integer

Any number in the set; A number with no fractional part.

Divisor(factor)

A number that divides the integer evenly (no remainder).

Kaplan Method for Problem Solving

Signals to pick numbers

6 Guessing Strategies

Data Sufficiency Strategy

1. Analyze the question... 2. State the task... 3. Approach strateg…

1. Variables in the question stem... 2. Percents in the answer c…

1. Critical thinking... 2. Estimate the answer... 3. Eliminate numb…

1. Analyze the question... •determine if it's yes/no or a value…

Kaplan Method for Problem Solving

1. Analyze the question... 2. State the task... 3. Approach strateg…

Signals to pick numbers

1. Variables in the question stem... 2. Percents in the answer c…

Integers

Consecutive Integers

Odd Numbers

Even Numbers

Sometimes called while or natural numbers. They can be negati…

Integers listed in order of increasing value without any inte…

Integers that cannot be divided by 2. These numbers have a re…

Integers that can be divided evenly by 2, leaving no remainder.

Integers

Sometimes called while or natural numbers. They can be negati…

Consecutive Integers

Integers listed in order of increasing value without any inte…

Divisible by 3 if

Divisible by 4 if

Divisible by 6 if

Divisible by 9 if

the sum of the digits of the dividend is a multiple of 3

the last two digits of the dividend form a number divisible b…

the dividend is even and the sum of its digits is a multiple…

the sum of the digits of the dividend is a multiple of 9

Divisible by 3 if

the sum of the digits of the dividend is a multiple of 3

Divisible by 4 if

the last two digits of the dividend form a number divisible b…

Integers

Consecutive integers

Prime #s

Divisible shortcuts: (tests if a numbe…

Whole #s (not fractions)... Can be + or -... 0 is an integer

Integers listed in order of increasing value w/o any integers…

Positive integer divisible by only itself and 1... Ex. 2,3,5,7... *…

3 - sum of its digits are divisible by 3... Ex. 216 - 2+1+6=9...…

Integers

Whole #s (not fractions)... Can be + or -... 0 is an integer

Consecutive integers

Integers listed in order of increasing value w/o any integers…

Powers of 2 up to 2^9

Powers of 3 up to 3^4

Powers of 4 up to 4^4

Powers of 5 up to 5^4

2^4 = 16, 2^5 = 32, 2^6 = 64, 2^7 = 128, 2^8=256, 2^9=512

3^3 = 27, 3^4 = 81

4^3 = 64, 4^4 = 256

5^3 = 125, 5^4 = 625

Powers of 2 up to 2^9

2^4 = 16, 2^5 = 32, 2^6 = 64, 2^7 = 128, 2^8=256, 2^9=512

Powers of 3 up to 3^4

3^3 = 27, 3^4 = 81

work rates tip

work rates tip 2

matrix problem

Least Common Multiple Problems

for problems that have work rates for groups of individuals--…

when dealing with finding times, once you get the fraction, t…

matrixes can be used to summarize data between two variables,…

two ways to solve these problems: ... -Prime factorization: ... fin…

work rates tip

for problems that have work rates for groups of individuals--…

work rates tip 2

when dealing with finding times, once you get the fraction, t…

Order of operations

Commutative Property

Associative property

Distributive property

PEMDAS

Changing the order of addends or factors does not change the…

Changing the grouping of addends or factors does not change t…

Multiplication distributes over addition or subtraction

Order of operations

PEMDAS

Commutative Property

Changing the order of addends or factors does not change the…

How do you multiply Fractions

How do you change a mixed number to a…

How do you divide a decimal

What are real numbers

multiply the two numerators and then multiply the two denomin…

Multiply the whole number by the denominator then add the num…

Make the divisor a whole number by moving the decimal and the…

Anything both positive and negative and 0 on the number line…

How do you multiply Fractions

multiply the two numerators and then multiply the two denomin…

How do you change a mixed number to a…

Multiply the whole number by the denominator then add the num…

Divisible by 3

Divisible by 4

Divisible by 6

Divisible by 8

If sum of digits is divisible by 3

If divisible by 2 TWICE, or if last 2 digits divisible by 4

If divisible by 2 and 3

If divisible by 2 three times or if last three digits divisib…

Divisible by 3

If sum of digits is divisible by 3

Divisible by 4

If divisible by 2 TWICE, or if last 2 digits divisible by 4