Divisibility rules

Front

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

Back

4

Front

What is the divisibility rule for 3?

Back

Add up the digits. The sum must be divisible by 3.

Front

What is the divisibility rule for 5?

Back

The last digit needs to be a 5 or 0.

Front

Is 1,284,604 divisible by 2?

Back

Yes, because 4 is an even number

Front

What is the divisibility rule for 3?

Back

Add up the digits. The sum must be a multiple of 3.

Front

What is the divisibility rule for 4?

Back

The last two digits must form a number that is a multiple of 4

Front

2520 is divisible by 6 because:

Back

It's divisible by 2 (even) and 3 (sum of digits is a multiple of 3)

Front

A number is divisible by 10 if

Back

It ends in 0

Front

How do you know if a number is divisible by 12?

Back

If it is divisible by 3 and 4

Front

How do you know if a number is divisible by 8?

Back

If the last 3 digits is divisible by 8