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

Is 462 divisible by 3?

Back

Yes, because 4 + 6 + 2 = 12, and 12 is a multiple of 3.

Front

What is the divisibility rule for 3?

Back

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

Front

Is 56 divisible by 5?

Back

No, because the last digit is 6, which is not 0 or 5.

Front

What is the divisibility rule for 5?

Back

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

Front

Is 52,850 divisible by 2?

Back

Yes, because the last digit is 0, which is even.

Front

Is 27 divisible by 2?

Back

No, because the last digit is 7, which is not even.

Front

Is 84 divisible by 3?

Back

Yes, because 8 + 4 = 12, and 12 is a multiple of 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.