Need help adjusting? No problem. I turned fifty-twenty this year. I regard this as the mid-fifties. In ten years when I am (with luck) fifty-thirty, I will accept that I have reached the late fifties. As to the original problem: Age is more multiplicative than additive. That is, the difference between being 5 and being 10 more closely resembles the difference between 20 and 40 (twice 20) than between 20 and 25 (five more than 20). If you accept this multiplicative feature then the midpoint between 20 and 30 is ten times the square root of six. But I assume the real bet was that you could get forum posters to argue about whether or not 27 is mid-twenties. It appears that you have won! :D Thanks ken can I be 20 40 and will it help me pull the young birds :( :(