Is it possible for five different forces to act on an object and the net force on the object still be zero?

Sure.

-- Three forces all pointing north, each of them = 10 pounds.

-- Two forces both pointing south, each one = 15 pounds.

or

-- One 10-pound force pointing north, one east, one west. (Three forces.)

-- Two forces both pointing south, each = 5 pounds.

There are an infinite number of ways to arrange five forces with the same or different

magnitudes, in different directions such that their vector sum is zero.