IN THE BOOKS OF DRAWER/ PROMISSOR

The letters of the word DRAWER are arranged in alphabeticla ordr. The number of arrangements that precede the work REWARD is

Statement : All Cameras are books Some pens are Cameras. Conclusion: I. All pens are books II. Some books are pens

In a school library, the ratio of mathematics books to Science books is the same as the ratio of Science books to Hindi books. If there are 450 books in Science and 300 books in Hindi, find the number of books in Mathematics.

Among four books, Book 1 is twice as heavy as Book 2's weight. Book 4 is 60 grams more as compared to Book 2 but 60 grams less as compared to Book 1. Which book is the heaviest?