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 4?

Back

A number is divisible by 4 if the number formed by its last two digits 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

What is the divisibility rule for 10?

Back

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

Front

Is 123456 divisible by 3?

Back

Yes, because the sum of the digits (1+2+3+4+5+6=21) is divisible by 3.

Front

Is 987654 divisible by 2?

Back

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