Divisibility Rules

Front

What is the divisibility rule for 5?

Back

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

Front

Is 75 divisible by 5?

Back

Yes, because it ends in 5.

Front

Is 984 divisible by 5?

Back

No, because it does not end in 0 or 5.

Front

What is the divisibility rule for 9?

Back

Add the digits together. If the sum is divisible by 9, the original number is divisible by 9.

Front

Is 2,385 divisible by 10?

Back

No, because it does not end in 0.

Front

Is 36,928 divisible by 4?

Back

Yes, because the last two digits (28) form a number that is divisible by 4.

Front

True or False: 40,500 is divisible by 6.

Back

True, because it is even and the sum of its digits (4+0+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

Is 48 divisible by 2?

Back

Yes, because it ends in 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.