I heard someone who must have been doing this quiz at work say that 6 acres times 5 acres is thirty somethings- i think it was yardlongs or something like that.
I thing icosagon is right, or shillings in a something (old word for pound?)
10000 Maniacs is a group, The recommended exercise level is 10000 steps a day.
fifty eight could be FE (simplest answer may be the best)