Are correspondence puzzles on-topic?

Question

Are correspondence puzzles on-topic?

I mean IQ-test-like tasks like this one

Or "complete the sequence" tasks, like "Complete this sequence of letters o t t ...".

There are definitely have multiply subjective answers, but often people would like to have a help with such a puzzles, this is what this site for.

Answer 1

There are definitely have multiply subjective answers

I think you're misunderstanding this a bit. The problem is not whether there can be multiple answers or ways to solve a puzzle, which actually happens quite often. (Otherwise, there would only be one answer per question.)

The problem is whether an answer can be determined or proven to be correct. For example, this is on-topic:

Q: How do I add 12+39?

• A1: You add 10+30=40, and then 2+9=11, and then put them together and get 51.
• A2: You add 12+40=52, and then you subtract 1 and get 51.
• A3: You add 12+30=42, and then you add 9 more and get 51.

and so on. I cannot stress this enough:

The problem is answer validity, not quantity.

Therefore, yes, these can be on-topic for the site.