Numbers

Different types of numbers
FACEPrep · 3 min read
In this article, we shall discuss the different types of numbers existing in the numeral system.
All you need to know about remainders
FACEPrep · 3 min read
In this article, we go through the concepts of remainders, remainder calculation, remainder theorem, Euler's theorem and Fermat's theorem.
Factors or divisors
FACEPrep · 2 min read
In this article we shall discuss the concepts of factors or divisors, finding factors of a number, finding number of divisors, prime factors and Totient function.
Units digit
FACEPrep · 2 min read
Units digit is the digit which denotes the 'number of ones' in that number. A few methods to find the units digit of a number are discussed.
Methods to find last two digits of large numbers
FACEPrep · 2 min read
Finding the last two digits of large numbers, written in an indirect exponential form, is a challenging task in quantitative aptitude problems. In this, we shall discuss methods to find the last two digits of such large numbers.
Factorial function
FACEPrep · 2 min read
In this, we shall discuss the basics of factorial function, applications of factorial function and binomial theorem.
Rules of divisibility
FACEPrep · 3 min read
In this, we discuss the rules of divisibility and divisibility test for numbers 2-16.
Base system
FACEPrep · 2 min read
The radix or base is the number of unique numerical digits, including zero, that a numeral system uses to represent numbers. In this, we discuss base system and base conversion.
Methods to find HCF and LCM - Important formula and tricks
FACEPrep · 4 min read
In this, we find Highest Common Factor (HCF) and Least Common Multiple (LCM) using division method and prime factorisation method.
Digital root
FACEPrep · 2 min read
Digital root (Digit sum) of a number is a result of the progressive summation of the digits of a number. In this, a few digit root rules are discussed.
Understanding greatest integer function and least integer function
FACEPrep · 2 min read
The greatest integer function, returns the value of the greatest integer less than or equal to a given value whereas, the least integer function, returns the value of the least integer more than or equal to a given value.