Divisibility Rules

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 5?

Back

A number is divisible by 5 if its last digit is 0 or 5.

Front

What is the divisibility rule for 10?

Back

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

Front

What does it mean for a number to be even?

Back

A number is even if it is divisible by 2.

Front

What does it mean for a number to be odd?

Back

A number is odd if it is not divisible by 2.

Front

What are prime numbers?

Back

Prime numbers are numbers greater than 1 that have no divisors other than 1 and themselves.

Front

What are composite numbers?

Back

Composite numbers are numbers greater than 1 that have more than two divisors.

Front

Are the numbers 0 and 1 prime or composite?

Back

Neither prime nor composite.

Front

What is an example of a number divisible by 3?

Back

Any number whose digits add up to a multiple of 3, like 123 (1+2+3=6).

Front

What is an example of a number divisible by 4?

Back

A number is divisible by 4 if the last two digits form a number that is divisible by 4, like 124.