Thinking reasonable slices here, I thought it out a minute and it is reasonable to say, about 8 people for an 8 inch cake. Taking a picture of an 8 inch circle (to scale) and drawing on it first a line across the middle center, and then to make it fours, and two more lines across and you get 8. SO 8 :D
8
it feeds 2 normal adults, maybe more if they are kids or women
The question cannot be answered as stated in simple mathematical terms. It depends on the size of each slice, whether or not everyone has the same amount.
20
1 million
An 8 inch square cake can reasonably be divided into 4 pieces, each of which will be 4 inches square.
It depends on how large the cake is.
A 9x13" cake will feed about 45 people (assuming that the cake has two layers, each layer is about 2" in height, and the slices are 1.5x2" in size).
A ten inch cake feeds about 12 people if you cut it in wedge like triangles, like a pizza. However if you go to wilton.com and look at the cutting guide, they say it feeds 38, realisticly, more like 30. That is if it is at least 2 layers. and those are uniform peices so everyone gets the same amout of cake. I like this way. it makes the cake go farther and no one eats half a piece and throws away the rest. and if people want more they can always go get another piece.
You should order for only 90% of your guests. Some people will not eat the cake. So again, only order for 90% - in your case that means 12 people or one cake box mix - or one 9 inch round/square cake.
Generally it depends on how deep (how many layers) your cake is. Standard serving size of a piece of cake is 1" x 2". Also depending on how large you want to cut your slices (sensible vs generous), a 7" round cake can serve anywhere from 6-10 people.
8
It depends on the cake. A 2 kilogram chocolate cake with no frosting would be a different volume than a 2 kilogram cheesecake.
100,000,000,000,000,000,000 because of the crumbs!!
An entire village in South Africa.
A 12" x 18" cake pan will make 72 servings.
6 Slices = 2-3 pax