Numbers is one of the most important topics. Good number of questions are asked in any exam. In most of the exams where quantitative aptitude is a test area, numbers is a key topic. Questions are often perceived to be difficult. But with a clear understanding of the concepts, these questions can be answered easily. Numbers is a big topic and I have covered the topic comprehensively. The following are some of the sub topics covered.
- Classification of numbers
- Divisibility rules
- Number of factors and related concepts
- Number of co primes and related concepts
- Reversing the digits of a number
- Relation between the sum and the product of numbers
- Squares and Cubes: Important observations
- Index of the greatest power (I.G.P) of a number
- L.C.M and H.C.F
- Successive Division
- How to find the units digit? How to find the last two digits?
- Remainders: Pattern Method, Remainder theorem Method, Binomial theorem method.
- Fermats little theorem
- Wilsons theorem