Factorise 15

To factorise 15, you need to break it down into its prime factors. The number 15 can be expressed as 3 × 5. Both 3 and 5 are prime numbers, meaning they cannot be divided further by any other whole numbers except for 1 and themselves. So, the complete prime factorization of 15 is 3 and 5! Did you know that factoring isn't just a math exercise? It's super useful in real life too! For example, if you're planning a party for 15 guests and want to know how to arrange seating, understanding factors can help you find different ways to group people together. You could have three tables with five people each or five tables with three people each. It’s a fun way to play around with numbers for practical problems!