Divisibility Rules! (2, 3, 5, 6, 9, 10)

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 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 it ends in 0.

Front

Is 144 divisible by 2?

Back

Yes, because it ends in 4.

Front

Is 123 divisible by 3?

Back

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

Front

Is 150 divisible by 5?

Back

Yes, because it ends in 0.

Front

Is 27 divisible by 9?

Back

Yes, because the sum of its digits (2+7=9) is divisible by 9.

Front

Which of the following numbers is not divisible by 5: 15, 20, 25, 30, 31?

Back

31 is not divisible by 5.