# numbers ## Number of Factors Concepts and Formulas for CAT exam

Number of factors based questions have regularly appeared in various competitive exams including CAT.  Primarily, these questions are based on the prime factorization of a number.  Generally,  factors based questions are of following types: The number of factors The sum of factors Product of factors Odd and Even Factors Number of Factors which are Perfect … ## Number of trailing zeroes and exponents of prime number in factorial

Finding the number of trailing zeroes in 100! (read factorial 100) has become the favorite question in quant among aspirants who prepare for CAT Exam.  In this section, we will be discussing the approaches to solve similar sorts of questions. Exponent of any prime number p in n! (factorial n) The exponent of any prime … ## Base System Concepts and Questions for CAT

We humans use decimal system for our mathematical calculations. We know that the computers work on binary system. Some of us who are from engineering or science background are also aware of octal and hexadecimal systems. But the base is not just limited to only these few; any number can be the base. It all … 