Divisibility Rules

Front

What is the divisibility rule of 2?

Back

All even numbers have a factor of 2.

Tags

CCSS.4.OA.B.4

Front

What is the divisibility rule for 5?

Back

The last digit needs to be a 5 or 0.

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CCSS.5.OA.B.3

Front

What are factors?

Back

Numbers that are multiplied together.

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CCSS.4.OA.B.4

Front

What is the divisibility rule for 3?

Back

Add up the digits. The sum must be divisible by 3.

Tags

CCSS.4.OA.B.4

Front

Why is 1 neither prime nor composite?

Back

Because it only has 1 factor: itself.

Tags

CCSS.4.OA.B.4

Front

What is a prime number?

Back

A number greater than 1 that has no positive divisors other than 1 and itself.

Tags

CCSS.4.OA.B.4

Front

What is a composite number?

Back

A number greater than 1 that has more than two positive divisors.

Tags

CCSS.4.OA.B.4

Front

What is the divisibility rule for 4?

Back

If the last two digits of a number form a number that is divisible by 4.

Tags

CCSS.4.OA.B.4

Front

What is the divisibility rule for 6?

Back

A number is divisible by 6 if it is divisible by both 2 and 3.

Tags

CCSS.3.OA.D.9

Front

What is the divisibility rule for 10?

Back

A number is divisible by 10 if its last digit is 0.

Tags

CCSS.3.OA.D.9