What is prime?

A prime is a number that can only be divided evenly by 1 and itself, like a special kind of building block.

Imagine you have a set of LEGO bricks. Some bricks can be split into smaller pieces, like a brick with 6 dots can be broken down into 2 groups of 3 or 3 groups of 2. But a prime number is like a single LEGO brick that cannot be split, it’s only made of itself and the smallest piece, which is 1.

Let's take the number 7. If you try to divide it by numbers like 2 or 3, it doesn’t come out even. Only 1 and 7 can fit into 7 without leaving any leftovers, that makes 7 a prime number.

Now think about 9. You can divide it evenly by 3 (because 3 × 3 = 9), so 9 is not prime, it has more than just two ways to be divided.

So, the rule is: A prime number has only two friends, 1 and itself, when it comes to dividing. That’s what makes them special! A prime is a number that can only be divided evenly by 1 and itself, like a special kind of building block.

Imagine you have a set of LEGO bricks. Some bricks can be split into smaller pieces, like a brick with 6 dots can be broken down into 2 groups of 3 or 3 groups of 2. But a prime number is like a single LEGO brick that cannot be split, it’s only made of itself and the smallest piece, which is 1.

Let's take the number 7. If you try to divide it by numbers like 2 or 3, it doesn’t come out even. Only 1 and 7 can fit into 7 without leaving any leftovers, that makes 7 a prime number.

Now think about 9. You can divide it evenly by 3 (because 3 × 3 = 9), so 9 is not prime, it has more than just two ways to be divided.

So, the rule is: A prime number has only two friends, 1 and itself, when it comes to dividing. That’s what makes them special!