Divisibility Rules

A number is divisible by 10 if....

• The number is even

• The number ends with a 5

• The number ends with a 0

• The number is odd

Tags

CCSS.3.NBT.A.3

A number is divisible by 4 if...

• The last two digits is divisible by 2 at least twice

• The last number is divisible by 2 and 3

• The last digit is 0

• The last two digits is divisible by 2 at least 3 times

A number is divisible by 5 if...

• The number is larger than 5.

• The last digit is 0.

• The last digit is even.

• The last digit is a 0 or a 5.

A number is divisible by 6 if...

• The number ends in a 0 or a 5.

• The number is divisible by 2 and 3.

• The number has a sum that is divisible by 3.

• The number is even.

The number 642 is divisible by...

• 2, 4, and 6.

• 2, 9, and 10

• 2, 3, and 6

• This is a prime number.

Tags

CCSS.6.NS.B.2

CCSS.6.NS.B.4

A number is divisible by 8 if...

• The number is divisible by two at least 3 times.

• The number is divisible by 2 and 3.

• The number is even.

• The sum of the numbers digits is divisible by 8.

A number is divisible by 9 if...

• The sum of the digits is divisible by 9

• The number is divisible by 2 and 3.

• The sum of the digits is divisible by 3

• The last digit of the number is 9.

Tough Question!

The number 51,840 is divisible by...

• Only 2, 5, and 10.

• Only 3, 5, and 10.

• 2, 3, 4, 5, 6, 8, and 9!

• Only 13.