As you are preparing for NMMS exam and it has two parts : MAT (Mental Ability Test) and SAT (Scholastic Aptitude Test). So important topics are :

Mental Ability Test (MAT)

• Number Series

• Alphabet Series

• Coding-Decoding

• Analogy (word & number)

• Classification (Odd One Out)

• Blood Relations

• Directions & Distance

• Mathematical Operations

• Non-verbal reasoning (mirror image, paper folding, figure patterns)

• Scholastic Aptitude Test (SAT)

  Mathematics (Class 7 & 8 based)

  • Algebra (equations, identities)

    Recommended

  • Geometry (triangles, quadrilaterals, circles, constructions)

  • Mensuration (surface area, volume)

  • Number System (integers, fractions, rational numbers)

  • Profit & Loss, Simple & Compound Interest

  • Ratio & Proportion, Percentage

  • Probability & Statistics (mean, median, mode, probability basics)

• Science

  • Physics: Motion, Force, Work & Energy, Sound, Light, Electricity

  • Chemistry: Acids, Bases & Salts, Metals & Non-metals, Synthetic Materials, Coal & Petroleum

  • Biology: Cell, Microorganisms, Reproduction, Food & Nutrition, Human Body Systems (Respiration, Circulation), Conservation of Plants & Animals

• Social Science

  • History: Freedom Movement, Nationalism, Revolt of 1857, Reform Movements, Indian Constitution

  • Geography: Resources, Agriculture, Industries, Natural & Human Environment

  • Civics/Political Science: Democracy, Rights & Duties, Government, Law & Justice