21. Which of the numbers below have 2,3 , and 4 as factors? Select all that apply. 86 72

Let's break this down! The number 72 is a champion when it comes to factors, as it can be evenly divided by 2, 3, and 4. In fact, it's a multiple of both 2 and 3 (2x36 and 3x24), and since 4 is a factor of 2, it's a win-win! On the other hand, 86 doesn't play in the same league; while it's divisible by 2, it fails the tests for 3 and 4. So, the answer is clear—72 is the star here! Looking into the world of factors, knowing how to break numbers down can really help simplify math problems or uncover relationships between numbers. Understanding factors can also be useful in fields like finance, for optimizing budgets by allocating resources effectively.