RS Aggarwal Solutions for Class 6 Chapter 2 describes “Factors and Multiples”. Factors and multiples are different things. But they both involve multiplication: Factors are what we can multiply to get the number. Multiples are what we get after multiplying the number by an integer (not a fraction). Factors are parts of numbers that, multiplied together, give a larger number. Each additional number is a multiple of 2. Factors and multiples are especially important in working with expanding and reducing fractions, as well as finding patterns in numbers. A factor of a number is an exact divisor of a number, and a number is said to be a multiple of any of its factors. Factors and multiples are used in dividing something equally, factoring with money, comparing prices, understanding time and making calculations while travelling. These include finding prime and composite numbers from 1 to 100, divisibility tests for 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11, general properties of divisibility, to find prime numbers between 100 and 200, prime factorization, HCF and LCM and properties of HCF and LCM of given numbers.