Is the number 245 divisible by 5?
Is 642 divisible by 2? You may have already guessed yes. Pretty easy right?

But what if I asked you, is 6,653,322 divisible by 3? Not so easy anymore…

What if we wanted to know if any number is divisible by any other number, like if 4,863,685 is divisible by 445, quickly and efficiently – without a calculator? By the end of this article you have the tools to do exactly this – let’s get started!