That's difficult to answer because a sponge cake is very light and a pound cake is very dense, so you really need to indicate the size of the cake to get a better answer.
as mANY
as mANY
that depends on how many slices you want.
Assuming you used the standard tube pan, anywhere from 8 to 12 slices depending upon whether it will be the stand alone dessert (8) or loaded with strawberries and cream for example (12)
18
Normally 12-16 slices but it depends on the sise of the cake.
25
Mathematically, you can receive an infinite amount of slices from a 10 pound ham by slicing slightly smaller and smaller.
12x12=144
If you're making your own, you can have as many slices as you want. If you are buying the ham sandwich at a restaurant, it will have the number of slices they normally use; usually one or two, depending on how thick the meat slices are.
If you mean a slice of cake it is - tranche
It depends how big you want the slices.
A diabetic pound cake recipe is a pound cake recipe that presumably substitutes the sugar in the normal cake recipe for Splenda or some other diabetic safe sugar substitute. There are many such recipes you can find on the web.