Multiple of 3 but not a multiple of 4?

Ah, what a happy little question! A number that is a multiple of 3 but not a multiple of 4 is like a unique little tree in a big, colorful forest. Let's paint a picture together: how about the number 9? It's divisible by 3 but not by 4, just like a beautiful little bush standing out in the meadow. Keep exploring, and you'll find more of these special numbers in the vast landscape of mathematics.