B-trees and B+ trees are designed to maintain balance by

Statements: All Ubuntu are linux.

                           All linux are vista.

Statements:       

No Planet is a Moon

Some Moon are Star

All Axis are Planet

Only a few Sun are Axis

Statements:

All Composers are Professions.

Only a few Professions are Producers.

No Producer is Director.

Conclusions:

Statements:

Only a few Outlet are Showroom.

Few Showroom are Shop.

All Shop are Mart.

Conclusion:

Statement: 

At-least some E are F.

A few F are G.

Only a few H are F.

All F are Q.

Conclusion:

Statements:

Only few savers are depositors

Few depositors are chequers

Only chequers are senders

Conclusions:

Statement:

No Iran is Bhutan.

Only a few USA are UK.

No UK is Iran.

Conclusion:

I. Some UK is not USA.

II. Some Bhutan is USA.

Statements:

All pink are red

All red are green

No red is a blue

Conclusion:

I. Some green are not blue.

II. No pink is a blue

III. All green are pink

Among P, Q, R, S and T whose salary is the highest?