Statements : No unit is a part. All parts are items. Some items are elements.

Conclusions :

1.                      No unit is an element.
2.                     At least some units are items.

Statements : Some bridges are roads. No road is underpass.

Conclusions :

1.                      Some bridges are underpasses.
2.                     No bridge is an underpass.

Statements : All calls are mails. Some mails are posts. Some posts are letters.

Conclusions :

1.                      All mails are calls.
2.                     No call is a letter.

Statements :  Some vehicles are cars. Some cars are trucks. All trucks are sedans.

Conclusions :

1.                  All vehicles being sedans is a possibility.
2.                     All least some cars are sedans.

300,298,307,279,344,?

1,2,6,21,88,?