The five problems are apparently easy but needs clear grasp of the most basic basics. The solutions and concepts are explained in details. Important concepts used are on possible square root values, indices, pattern discovery, minimization of a quadratic expression, and surd properties. The Concepts and Techniques form the BASIC SKILLSET for solving harder algebra problems EASILY IN MIND.
These are the first 5 questions 1 to 5 and form the 1st part of video on the article SSC CGL Solution set 13, Algebra 6 from SureSolv.com.