Factors & Multiples

12 and 18 share a secret. 12 splits cleanly into 6 groups of 2; 18 splits into 6 groups of 3 — so 6 divides both. And if you count by 12s (12, 24, 36…) and count by 18s (18, 36, 54…), they high-five at 36. One number goes INTO them; the other comes OUT of them. Same pair, two opposite relationships.