Divisibility Rules #1

it ends in 3

the last two digits can be divided by 3

you add up all of the digits and that sum can be divided by 3

it's even

it ends in 4

it ends in 5

it's odd

you add up all of the digits and the sum can be divided by 2

it's even

it ends in 0

it ends in 5 or 0

you add up the digits and it equals a multiple of 10.

all digits adds up to 10.

it's even

the sum of the digits is divisible by 6

the last two digits are even

it is divisible by 2 and by 3

you add the digits and that sum is divisible by 9

the last two digits are divisible by 9

if it's odd

it has many factors

it has only 1 and itself as factors

it is an even number

it is only divisible by itself and 1

it has many factors

is an even number

only has factors of 1 and itself

has only 2 factors

is divisible by 4

is divisible by 2

is divisible by 3

is divisible by 5