divisibility rules flashcard

Front

What is an even number?

Back

An even number is any integer that can be divided by 2 without leaving a remainder. Examples include 0, 2, 4, 6, 8, etc.

Front

How can you tell if a number is divisible by 10?

Back

A number is divisible by 10 if it ends in 0.

Front

What is the rule for a number to be divisible by 9?

Back

A number is divisible by 9 if the sum of its digits is divisible by 9.

Front

What does it mean for a number to be divisible by another number?

Back

A number is divisible by another number if you can divide them without leaving a remainder.

Front

Which of the following numbers is divisible by 5? 15, 22, 30, 44

Back

15, 30 are divisible by 5 because they end in 0 or 5.

Front

What is the divisibility rule for 2?

Back

A number is divisible by 2 if it is even, meaning it ends in 0, 2, 4, 6, or 8.

Front

If the sum of the digits of a number is 12, is it divisible by 3?

Back

Yes, because 12 is divisible by 3.

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.

Front

Can a number be divisible by both 2 and 3?

Back

Yes, if a number is even (divisible by 2) and the sum of its digits is divisible by 3.

Front

What is an example of a number that is divisible by 6?

Back

12 is divisible by 6 because it is even and the sum of its digits (1+2=3) is divisible by 3.