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 5?

Back

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

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 252 divisible by 9?

Back

Yes, because the sum of the digits (2+5+2=9) is a multiple of 9.

Front

Is 816 divisible by 3?

Back

Yes, because the sum of the digits (8+1+6=15) is a multiple of 3.

Front

Is 81 divisible by 3?

Back

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

Front

Is 525 divisible by 5?

Back

Yes, because it ends in 5.

Front

Which of the following is an even number: 1, 9, 4, 5?

Back

4 is an even number.