A sum of money lent out at simple interest amounts to ₹720 after 2 years and 1020 after a further period of 5 years. Find the principal. 

The marked price of an article is ₹ 100. A discount series of 5%, 10% successively reduces the price of an article by 

In the following Questions, four words are given in each question, out of which only one word is correctly spelt. Find the correctly spelt word and mark your answer in the Answer Sheet.

Directions (A-E) : In the following passage, some of the words have been left out. First read the passage over and try to understand what it is about. Then fill in the blanks with the help of the alternatives given.
 The library, if used properly, is invaluable in helping you develop discernment. It is rich in information that goes far beyond the (A) of any one text book or course. If your text book author does not make a particular (B) clear and you feel the need (C) another description in greater detail or in other words, go to the library and check other books on the subject. By calling (D) two or three writers dealing with the same topic, you will find some (E) of certain facts. In seeking additional sources, you will have gained immeasurably, for you will have seen what several experts perceive as being particularly important on a common subject.

(E)

An example of an analog computer is-

Direction: In the following question, out of the four alternatives, choose the one which best expresses the meaning of the given word as your answer.
Mentor

British driver Lewis Hamilton won the fifth trophy of this season by winning which race?

The two trains cross each other in 12 seconds, moving in the opposite direction, and they take 60 seconds to travel in the same direction. both trains can have speed in (m/sec).