Question

How many scoops of two flavors of ice cream will it take to make 88 different ice cream cones?

Answer 1

Let V=vanilla, C=chocolate

One scoop (2): V, C
Two scoops (4): VC, VV, CV, CC
Three scoops (8):
VVV,VVC,VCV,VCC,CVV,CVC,CCV,CCC
Four scoops (16):...
etc.
Get the idea?