Divisibility Rules

Front

What is a divisibility rule?

Back

A rule that helps determine if one number can be divided by another without leaving a remainder.

Front

What is the divisibility rule for 2?

Back

A number is divisible by 2 if it ends in 0, 2, 4, 6, or 8.

Front

What is the divisibility rule for 3?

Back

A number is divisible by 3 if the sum of its digits is divisible by 3.

Front

What is the divisibility rule for 4?

Back

A number is divisible by 4 if the last two digits form a number that is divisible by 4.

Front

What is the divisibility rule for 5?

Back

A number is divisible by 5 if it ends in 0 or 5.

Front

What is the divisibility rule for 6?

Back

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

Front

What is the divisibility rule for 10?

Back

A number is divisible by 10 if it ends in 0.

Front

What is a prime number?

Back

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

Front

Which of the following is not a prime number: 2, 3, 4, 5?

Back

4 is not a prime number.

Front

Is 36,928 divisible by 4?

Back

Yes, because the last two digits (28) are divisible by 4.