Understanding the Basics of Number Systems The number system is a fundamental topic in quantitative aptitude, crucial for competitive exams and interviews. It requires no formulas but understanding key concepts like prime numbers, divisibility rules, integers, rational and irrational numbers. Numbers are divided into real (normal) and imaginary categories; however, focus should be on real numbers as they dominate exam questions.
Classification of Real Numbers Real numbers split into rational (finite or repeating decimals) and irrational types (non-terminating non-repeating). Rational includes integers—further categorized as positive integers starting from 1 to infinity; negative ones extending negatively without limit; zero—and fractions with numerators/denominators.
Detailed Breakdown: Positive Integers & Natural Numbers Positive integers divide further: natural series beginning at one versus whole-number sequences including zero upwards alongside subsets such even odds primes composites defined respectively by factor counts properties making them distinctively useful solving problems efficiently within contexts discussed earlier lessons preparing aspirants effectively tackling challenges ahead!