Divisibility Rules

Front

What is a divisibility rule?

Back

A divisibility rule is a shortcut that helps determine if one number can be divided by another without performing the actual division.

Front

What is the divisibility rule for 2?

Back

A number is divisible by 2 if its last digit (ones place) 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 either 0 or 5.

Front

Is 8,425 divisible by 5?

Back

True, because the last digit is 5.

Front

Is 462 divisible by 3?

Back

True, because 4 + 6 + 2 = 12, and 12 is divisible by 3.

Front

Is 970 divisible by 5?

Back

True, because the last digit is 0.

Front

Is 7,154 divisible by 2?

Back

True, because the last digit is 4, which is even.

Front

Is 278,190 divisible by 5?

Back

True, because the last digit is 0.

Front

What is the divisibility rule for 10?

Back

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