>>Problem 2: What is the next letter in this series: OTTFFSSEN?
>
>T
Yes, that's right. I will post the explanation (which, I am sure, you know in the case of problem #2) in a few hours more, if nobody else does it first.
Hilmar.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)