4This was the puzzle I posed:
1 2 5 20 1 4 5 20 ?
What is the missing number.
And here is another:
Firstly Ethang5
Secondly Athias
Lastly Seldiora.
But what was seventh?
Without the parameters, it's pointless to address either puzzle. For the first puzzle, I suspect that some "reverse engineering" has to take place, an oddity for number puzzles. Thus far, based on the information you've given, it's not a sequence, so the order in which they're placed or the consistency of any arithmetical operation which relates them are of no consequence. What are the restrictions? Is it a series of just nine numbers? Each number is a factor of 20. With the exceptions of "2" and "4," each number has a frequency of two. But this doesn't do much of anything without the parameters. We're not identifying that last number as much as we are guessing at the rules you've set when creating this series. For example: [93100000000?] What's the last number? That last number can be anything depending on my rules.
The same goes for the second puzzle. Mentioning my name in some order with other members indicates nothing more than mentioning our names. I don't think this reflects mental acuity as much as it reflects throwing spaghetti at the wall and seeing what sticks.