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 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 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 its last digit is 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 9?

Back

A number is divisible by 9 if the sum of its digits is divisible by 9.

Front

Is 19,584 divisible by 9?

Back

Yes, because the sum of its digits (1+9+5+8+4=27) is divisible by 9.

Front

Is 555,509 divisible by 3?

Back

No, because the sum of its digits (5+5+5+5+0+9=29) is not divisible by 3.

Front

Which of the following statements is true of the number 36?

Back

It is divisible by 2, 3, 4, 6, and 9.