The set {a} has two subsets--{a} and Ø. Is it possible to list them in
sequence so that each new subset differs from the one before it by adding
or subtracting one element?
How many subsets does {a, b} have? Can you list them all? Can you list
them in the order required?
How many subsets does the n-element set {a1, a2,..., an} have?
Can you arrange the subsets of {a, b} in a diagram that shows which subset
is contained in another? How about for {a, b, c}?
Note! We do not include results for these warm up problems on the Making Mathematics
Web site.
