SSC CGL Model Paper 16

Concept:Express all book weights in terms of Book 2 and compare them.Explanation:Let the weight of Book 2 be $x$ grams.Book 1 is twice Book 2, so Book 1 $= 2x$ grams.Book 3 is half of Book 2, so Book 3 $= \frac{x}{2}$ grams.Book 4 is $60$ grams more than Book 2: Book 4 $= x + 60$.Book 4 is also $60$ grams less than Book 1: Book 4 $= 2x - 60$.So, $x + 60 = 2x - 60$.Solving gives $x = 120$.Thus, Book 1 $= 240$ g, Book 2 $= 120$ g, Book 3 $= 60$ g, Book 4 $= 180$ g.Clearly, Book 1 is the heaviest.Answer:Book 1 is heaviest.