Everybody in a room shakes hands with everybody else. The total number of hand-shakes is 55. The total number of persons in the room is:

Who were named as Tennis Federation's (ITF) World Champions?

The Export Credit Guarantee Corporation (ECGC)of India Ltd is based in_____________

The maximum number of students among whom 1001 pens and 910 pencils can be distributed in such a way that each student gets same number of pens and same number of pencils, is: 

If the sum of the digits of any integer lying between 100 and 1000 is subtracted from the number, the result always is : 

In the following question below are given some statements followed by some conclusions. Taking the given statements to be true even if they seem to be at variance from commonly known facts, read all the conclusions and then decide which the given conclusion logically follows the given statements. 

Statements: 

Some schools are Laboratories. 

All Laboratories are theatres. 

Conclusion: 

I. Some theatres are schools. 

II. No school is a theatre.