Reasoning with Divisibility

Front

What are the factors of 24?

Back

1, 2, 3, 4, 6, 8, 12, 24

Front

What is a prime number?

Back

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.

Front

Is 5 a prime number?

Back

Yes, 5 is a prime and odd number.

Front

What is a composite number?

Back

A composite number is a natural number greater than 1 that is not prime, meaning it has more than two positive divisors.

Front

Is 3 a factor of 21?

Back

Yes, 3 is a factor of 21.

Front

What is a multiple of 10?

Back

Multiples of 10 are numbers like 10, 20, 30, 40, 50, etc.

Front

Find the missing multiple: 10: 10, 20, 30, 40, ___, 60, 70, 80

Back

50

Front

What are the first five prime numbers?

Back

2, 3, 5, 7, 11

Front

What does it mean for a number to be even?

Back

An even number is any integer that is exactly divisible by 2.

Front

What does it mean for a number to be odd?

Back

An odd number is an integer that is not divisible by 2.