This is an intriguing puzzle that came to me on a Sunday afternoon.

What’s the pattern?

5 4 3 2 1

5 3 1

9

7 6 5 4 3

7 5 3

6

9 8 7 6 5

9 7 5

3

11 10 9 8 7

11 9 7

?

Hint #1: Not every pattern is addition. One of the most challenging puzzles (for me) to solve was one by @drewfoster where each number had to be interpreted as a word to solve the puzzle, i.e. 7 needed to be interpreted as the word seven in the puzzle

**If 7+5=9+7**

**What does 20-5 equal?**

Hint #2: Sometimes, the pattern is a series of unrelated steps: descending order for 5 integers, descending order of their largest odd numbers.

Hint #3: Engage in **math talk** with a partner. If you got 9, understand the logic of the person who got 0. Maybe you’re both right. Maybe you’re both wrong.