The numbers 20, 30, and 40 are consecutive multiples of 10. Here's a breakdown:
- 20 is 20 × 1
- 30 is 20 × 1.5
- 40 is 20 × 2
If you're looking for a pattern or a relationship between them, they could be part of a sequence, a series, or a mathematical sequence. Let me know if you'd like to explore a specific pattern or formula!