Ken: I think we both overanalyzed that word problem. When Jeff said it would be simple math I thought it would be 5 + 5. I thought in the word problem I said the last 2 numbers or the sum of the last 2 numbers were supposed to equal the middle numbers, and I thought it was the last two numbers, but it turned out to be the first and the last number.
Incidentally, I thought the exact same thing as he did at first. I thought it meant the last two numbers, and was totally caught off guard when I saw the solution.