Divisibility Rules

Front

What is a divisibility rule?

Back

A rule that helps determine if one number is divisible by another without performing division.

Front

What is the divisibility rule for 2?

Back

A number is divisible by 2 if its last digit is even (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 5?

Back

A number is divisible by 5 if its last digit is 0 or 5.

Front

What is the divisibility rule for 10?

Back

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

Front

Is 984 divisible by 5?

Back

No, because its last digit is 4.

Front

Is 1,284,604 divisible by 2?

Back

Yes, because its last digit is 4, which is even.

Front

Is 81 divisible by 3?

Back

Yes, because the sum of the digits (8 + 1 = 9) is divisible by 3.

Front

Is 40,020 divisible by 9?

Back

No, because the sum of the digits (4 + 0 + 0 + 2 + 0 = 6) is not divisible by 9.

Front

Which of these numbers is divisible by both 2 and 5? 675, 674, 670, 673

Back

670, because it ends in 0.