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 5?

Back

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

Front

What is the divisibility rule for 10?

Back

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

Front

Is 36 divisible by 3?

Back

Yes, because the sum of its digits (3 + 6 = 9) is divisible by 3.

Front

Is 48 divisible by 4?

Back

Yes, because the last two digits (48) form a number that is divisible by 4.

Front

Is 100 divisible by 10?

Back

Yes, because it ends in 0.

Front

Which of these numbers is divisible by 2: 21, 34, 55?

Back

34, because it is even.

Front

Is 81 divisible by 9?

Back

Yes, because 8 + 1 = 9, which is divisible by 9.

Front

What is the divisibility rule for 6?

Back

A number is divisible by 6 if it is divisible by both 2 and 3.