1) How many subsets does a set A ={a,b,c,d} have?

Prove that (i) if a set has only one element , then it has 2 subsets . (ii) If BsubA and if B has one elements less than that of A, prove that A has twice as many subsets as B . (iii) Deduce from these two results that a set with 2 elements has 2^(2) subsets , a set with 3 elements has 2^(3) subsets , and so on . How many subsets does a set with n elements have ?

How many surfaces does a cone have ?

How many faces does a cube have?

How many edges does a cone have?

How many chambers does a cow's stomach have?

How many humps does a Llama have?

How many sides does an octagon have?

Consider the set A. How many subsets does P(A) have ?[P(A) represents the Power set of the set A].