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

Is 95 divisible by 5?

Back

Yes, because it ends in 0 or 5.

Front

Which of these numbers is divisible by 3: 4500, 3700, 5200, 1000?

Back

4500, because the sum of its digits (4+5+0+0=9) is divisible by 3.

Front

What is the divisibility rule for 2?

Back

A number is divisible by 2 if it ends in 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 it ends in 0 or 5.

Front

Which of these numbers is divisible by 9: 1308, 495, 361, 842?

Back

495, because the sum of its digits (4+9+5=18) 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

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

Back

4, because it is divisible by 2.

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.