Item 1.2.3.c.
\(2^4 = 16\text{.}\) (Note, if you wish to exclude the empty set - it does not contain odd numbers, but no evens either - then you could subtract 1).
\(2^4 = 16\text{.}\) (Note, if you wish to exclude the empty set - it does not contain odd numbers, but no evens either - then you could subtract 1).