Statements: Some houses are offices. Some offices are schools. Conclusions:  Some schools are houses. Some offices are houses. No house is school. Some schools are offices.

Since both the premises are particular, no definite conclusion follows. However, I and III involve only the extreme terms and form a complementary pair. So, either I or III follows. II is the converse of the first premise while IV is the converse of the second premise. Thus, both of them hold.