Statements: All sharks are fishes. Some fishes are birds. All birds are trees. All trees are insects.

Conclusions:

I. Some insects are sharks.

II. Some sharks are trees.

III. All insects are birds.

IV. Some birds are sharks.

Statements: All tables are round. Some hills are round. Some rivers are hills. All rivers are conical.

Conclusions:

I. Some rivers are round.

II. Some hills are conical.

III. Some rivers are both hills and round.

IV. Some tables are conical.

Statements: Some buildings are rivers. Somemountains are both buildings and rivers. Some roads are buildings. All roads are trucks.

Conclusions:

I. Some mountains are roads.

II. Some buildings are trucks.

III. Some rivers are roads.

IV.Some trucks are rivers.

Statements: All books are diaries. Some diaries are pens. Some pens are drawers. All drawers are chairs.

Conclusions:

I. Some drawers are diaries.

II. Some chairs are pens.

III. Some pens are books.

IV. Some diaries are books.

Statements: All suns are stars. All moons are stars. Some planets are suns. Some stars are gases.

Conclusions:

I. Some stars are planets.

II. Some suns are gases.

III. No moon is a planet.

IV. Some gases are moons.

Statements: Some robots aremachines. Some computers are both robots andmachines. Some animal are machines. Some toys are animals.

Conclusions:

I. Some toys are robots.

II. Some toys are machines.

III. Some animals are computers.

IV.Some robots are not toys.