# Study sets matching "gmat number properties"

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Prime Number

Formula for Prime #s > 3

Factor

Factor Properties

2 divisors - 1 and itself

6n+1 or 6n-1

Divisor of an integer n... Integer which divides evenly into n

1. If a is a factor of c and a is a factor of b, then a is a f…

Prime Number

2 divisors - 1 and itself

Formula for Prime #s > 3

6n+1 or 6n-1

An integer is divisible by 3 iff

An integer is divisible by 4 iff

An integer is divisible by 6 iff

An integer is divisible by 8 iff

the sum of the integer's digits is divisible by 3

the integer is divisible by 2 twice, or the integer's last two…

the integer is divisible by both 2 and 3

the integer is divisible by 2 three times, or the integer's la…

An integer is divisible by 3 iff

the sum of the integer's digits is divisible by 3

An integer is divisible by 4 iff

the integer is divisible by 2 twice, or the integer's last two…

An integer is said to be divisible by a…

An integer is divisible by....

A factor is a positive integer that div…

A multiple of an integer is formed by m…

...

- 2 if the integer is even... - 3 if the same of the integer's di…

For example, 1, 2, 3, and 8 are all the factors (also called d…

...

An integer is said to be divisible by a…

...

An integer is divisible by....

- 2 if the integer is even... - 3 if the same of the integer's di…

First ten prime numbers

Factor foundation rule

Divisible by 3

Greatest Common Factor (GCF)

2,3,5,7,9,11,13,17,19,23

If a is a factor of b, and b is a factor of c, then a is a fac…

Sum of digits is divisible by 3

Largest divisor of two or more integers. (Product of shared ar…

First ten prime numbers

2,3,5,7,9,11,13,17,19,23

Factor foundation rule

If a is a factor of b, and b is a factor of c, then a is a fac…

An integer is divisible by 2 if:

An integer is divisible by 3 if:

An integer is divisible by 4 if:

An integer is divisible by 5 if:

It is even

The sum of the integer's digits is divisible by 3

The integer is divisible by 2 twice, or if the last two digits…

The integer ends in 5 or 0

An integer is divisible by 2 if:

It is even

An integer is divisible by 3 if:

The sum of the integer's digits is divisible by 3

an integer is said to be divisible by a…

an integer is divisible by 2 when...

an integer is divisible by 3

an integer is divisible by 4

the integer can be divided by that number with an integer resu…

the integer is even. ex 12 is, 13 isn't

if the sum of the integer's digits is divisible by 3. ex 72 is…

if the last two digits are divisible by 4. for large numbers c…

an integer is said to be divisible by a…

the integer can be divided by that number with an integer resu…

an integer is divisible by 2 when...

the integer is even. ex 12 is, 13 isn't

Integers ... (Definition)

Real Numbers ... (Definition)

Rational Numbers... (Definition)

Factors/Divisors... (Definition)

Whole numbers (positive and negative and 0); subset of Real/Ra…

All numbers except unreal numbers (everything on the number li…

All whole numbers and fractions. Any number that can be expres…

a number of +integers that divide perfectly without a remainde…

Integers ... (Definition)

Whole numbers (positive and negative and 0); subset of Real/Ra…

Real Numbers ... (Definition)

All numbers except unreal numbers (everything on the number li…

divisibility rules

divisibility rules part 2

arthemetic rules of odds and evens

if you have an even number of negative…

- integer is divisible by two if integer is even... - integer is…

- integer is divisible by 5 if integer ends in 0 or 5... - intege…

addition/subtraction... E +/ E = E... O +/- E = O... O +/- O = E... mult…

the answer is positive

divisibility rules

- integer is divisible by two if integer is even... - integer is…

divisibility rules part 2

- integer is divisible by 5 if integer ends in 0 or 5... - intege…

Divisibility Rule - 3

Divisibility Rule - 4

Divisibility Rule - 6

Divisibility Rule - 8

If sum of the integer's digits is divisible by 3

If the integer is divisible by 2 twice... OR... If the last two digi…

If divisible by both 2 and 3... (It is an even number that is als…

If divisible by 2 three times... OR... If the last three digits are…

Divisibility Rule - 3

If sum of the integer's digits is divisible by 3

Divisibility Rule - 4

If the integer is divisible by 2 twice... OR... If the last two digi…

Interger

Arithmetic Processes that ALWAYS result…

Arithmetic Process that SOMETIMES resul…

Intergers are Divisible by 2 if

positive and negative numbers that are whole. Includes zero

addition... subtraction... multiplication

division

the interger is even

Interger

positive and negative numbers that are whole. Includes zero

Arithmetic Processes that ALWAYS result…

addition... subtraction... multiplication

Bowtie Approach

Lowest Common Denominator Method vs Bow…

Decimal place values

Postive exponent

Adding or subtracting fractions using this formula:... a/b + c/d…

Use LCD when all the numbers in the denominators are factors o…

6,493.783... thousands, hundreds, tens, units . tenths hundredths…

Move the decimal to the right by the number of places represen…

Bowtie Approach

Adding or subtracting fractions using this formula:... a/b + c/d…

Lowest Common Denominator Method vs Bow…

Use LCD when all the numbers in the denominators are factors o…

Integer

Positive vs. Non-negative numbers

Rational numbers

Irrational numbers

Positive or negative WHOLE numbers (including zero!)

Zero is not a negative number BUT zero is a non-positive number

All numbers that can be expressed as the ratio of two integers…

All real numbers that are not rational, both positive and nega…

Integer

Positive or negative WHOLE numbers (including zero!)

Positive vs. Non-negative numbers

Zero is not a negative number BUT zero is a non-positive number

0 is odd or even?

When a number is odd or even

Rational Numbers

Irrational Numbers

0 is an even number

it must an integer

All numbers that can be expressed as the ratio of 2 integers:a…

All real numbers that are not rational, both postive or negati…

0 is odd or even?

0 is an even number

When a number is odd or even

it must an integer

How do you know if a number is divisibl…

How do you know if a number is divisibl…

How do you know if a number is divisibl…

How do you know if a number is divisibl…

If the sum of the number's digits is divisible by 3

If it's divisible by 2 twice, or if the last two digits are di…

if it's divisible by both 2 and 3

if the sum of its digit's is divisible by 9

How do you know if a number is divisibl…

If the sum of the number's digits is divisible by 3

How do you know if a number is divisibl…

If it's divisible by 2 twice, or if the last two digits are di…