Did you know the first number that both 3 and 4 love is 12?
It might sound like a trivial math fact, but once you start exploring common multiples, you’ll see how they sneak into everyday life—from scheduling to coding. Stick around, and you’ll learn not just how to find them, but why they matter and how to spot patterns faster than a calculator.
What Is a Common Multiple
A multiple of a number is what you get when you multiply that number by an integer. So, 12 is a multiple of 3 because 3 × 4 = 12, and it’s also a multiple of 4 because 4 × 3 = 12.
When a number is a multiple of two (or more) numbers at once, we call it a common multiple. The smallest positive number that works for both is the least common multiple (LCM) Surprisingly effective..
