Divisibility Rules

Front

What is the divisibility rule for 10?

Back

The last digit is zero.

Front

What is the divisibility rule for 3?

Back

The sum of the digits is a number divisible by 3.

Front

What is the divisibility rule for 6?

Back

It is divisible by 2 and 3.

Front

What does it mean if a number is divisible by 2?

Back

The last digit of the number is even (0, 2, 4, 6, or 8).

Front

What does it mean if a number is divisible by 5?

Back

The last digit of the number is either 0 or 5.

Front

What is the divisibility rule for 4?

Back

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

Front

What is the divisibility rule for 9?

Back

The sum of the digits is a number divisible by 9.

Front

If a number is divisible by 6, what other divisibility rules does it satisfy?

Back

It is divisible by both 2 and 3.

Front

What is the divisibility rule for 8?

Back

The last three digits of the number form a number that is divisible by 8.

Front

What does it mean if a number is prime?

Back

It has exactly two distinct positive divisors: 1 and itself.