Common factors and multiples mastery test

Factors and multiples are different things.

But they both involve multiplication:

Factors are what we can multiply to get the number

Multiples are what we get after multiplying the number by an integer (not a fraction).

Example: the positive factors, and some multiples, of 6:

factors of 6: ..., 1, 2, 3, 6; multiples of 6: ... 0, 6, 12, 18, ...

Factors:

1 × 6 = 6, so 1 and 6 are factors of 6

2 × 3 = 6, so 2 and 3 are factors of 6

Multiples:

0 × 6 = 0, so 0 is a multiple of 6

1 × 6 = 6, so 6 is a multiple of 6

2 × 6 = 12, so 12 is a multiple of 6

and so on

(Note: there are negative factors and multiples as well)

Here are the details:

Factors

"Factors" are the numbers we can multiply together to get another number:

in 2x3=6, 2 and 3 are factors

2 and 3 are factors of 6

A number can have many factors.

Example: 12

3 × 4 = 12, so 3 and 4 are factors of 12

Also 2 × 6 = 12, so 2 and 6 are also factors of 12,

And 1 × 12 = 12, so 1 and 12 are factors of 12 as well.

AND because multiplying negatives makes a positive, −1, −2, −3, −4, −6 and −12 are also factors of 12:

(−1) × (−12) = 12

(−2) × (−6) = 12

(−3) × (−4) = 12

So ALL the factors of 12 are:

1, 2, 3, 4, 6 and 12

AND −1, −2, −3, −4, −6 and −12

Learn about Greatest Common Factor and how to find All Factors of a Number.

Multiples

A multiple is the result of multiplying a number by an integer (not a fraction).

Example: Multiples of 3:

Multiples of 3: ..., −9, −6, −3, 0, 3, 6, 9, ...

..., −9, −6, −3, 0, 3, 6, 9, ...

Example: 15 is a multiple of 3, as 3 × 5 = 15

Example: 16 is not a multiple of 3

Example: Multiples of 5:

Multiples of 5: ..., −15, −10, −5, 0, 5, 10, 15, ...

..., −15, −10, −5, 0, 5, 10, 15, ...

Example: 10 is a multiple of 5, as 5 × 2 = 10

Example: 11 is not a multiple of 5

Learn more about Least Common Multiple.

Multiples of Anything

We must multiply by an integer, but the number that is being multiplied can be anything.

Example: Multiples of π

..., −2π, −π, 0, π, 2π, 3π, 4π, ...

2,600 divided by 80 = 32.5

step-by-step explanation: