I can remember doing weekly tests in English, arithmetic and something called intelligence every Friday in preparation for the 11+. Even then I used to find the intelligence tests infuriating because it was obvious to me that many questions could have a variety of answers that were all correct, depending on the criteria, but when the papers were marked, only one answer was acceptable.
In answer to the old men question, quite a lot of anatomical answers from livers to navels, would be correct. Some, such as teeth or fingers, wouldn't. Bald heads is equally obviously incorrect but wrinkles would be right.
Other answers might be fewer years ahead of them than behind them; the inevitability of death; and the fact that they are not old women.