Why do we study "STATISTICS"?
Introduction to Statistics: The word statistics came from the word "STATE". The general interest to the Government of any state is to know about the socio-economic structures of the population. Especially the interests converge on the total number of residents, their monthly average income, daily expenditures, and the summary of collected tax, etc. All such information is nothing but a form of Data. That is why STATISTICS came from the word "STATE". Contents: 1. Why do we study "STATISTICS"? 2. Types Of …
Logical Reasoning: Analogies
Logical Reasoning: Logical reasoning means the prediction of an unknown relationship between two objects based on a given relationship or using a known fact. Various problems can be identified as logical reasoning. One has to make use of his/ her logical ability to attack such problems. It has been seen that more practicing can improve logical reasoning skills. Example: Time series, Analogy, Verbal Classification, etc. Analogy: Analogy is a cognitive process of establishing logical relationships between objects. It can easily be ex…
Facts on prime numbers:
Important facts regarding prime numbers: Negative integers can not be considered as prime numbers. 1 is not a prime. Because no number except 1 divides 1. There exist a positive integer which is both even and prime. (The number 2) The set of all prime numbers does not form a group under usual addition operation because there does not exist any inverse. Under usual addition operation, inverse are the negative numbers. The set of all prime numbers does not form a group under the usual multiplication operation since the fractions are not…
Number Systems
Number Systems: We can't read easily the format with which data is stored inside a computer system. Due to that reason it requires an input-output interface. Here, my goal is to explain the basics of number systems so that the reader will be comfortable in understanding the codded forms of stored data (numbers, characters etc.). Mainly there are following two types of number systems. Classification of the Number System: Non- Positional Number System: In the early days, humans used to count using fingers, ston…
The fastest way to find a prime number
The fastest way to find a prime number: Before going into the details of the algorithm to check a number is prime or composite, we state the definition of a prime number and composite numbers. Prime Numbers: Def: A number that is divisible only by itself and 1. Example: 13. 13 is only divisible by 1 and 13. i.e, no other numbers except 1 and 13 divides 13. Hence 13 is a prime number. Composite Numbers: Def: A positive integer that has at least one factor except 1 and the number itself. Example: 10. 10 is divisible by…
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