Explanation:

Alright, you picked option 3 — let’s see if that holds up.

Let’s break down each pair:

- Option 1: 34 - 289

- 34 squared is 1156, not 289. But 17 squared is 289, and 34 is double 17.

- Option 2: 16 - 64

- 16 squared is 256, not 64. But 8 squared is 64, and 16 is double 8.

- Option 3: 26 - 168

- 13 squared is 169, not 168, and 26 is double 13. But here, 168 is just off by 1 from 169.

- Option 4: 18 - 81

- 9 squared is 81, and 18 is double 9.

Now, notice the pattern: in options 1, 2, and 4, the first number is double a number, and the second number is that number squared. But option 3 breaks the pattern—168 isn’t a perfect square, and it’s not exactly linked to 13 (squared is 169), unlike the others.

So, you nailed it. Option 3 is the outlier. ??