Number System

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Number system is mathematical notation to represent the numbers as binary symbol, decimal symbol etc. 

Natural Number
Numbers used for counting are known as natural numbers. Minimum natural number is 1 and maximum is infinity. 
1, 2, 3, 4, 5, 6,  …………. infinity

Whole numbers
Counting number along with zero are whole numbers.
0, 1, 2, 3, 4, 5, 6,  …………. 

All Counting numbers (i.e. 1, 2, 3, 4, etc), 0 and negative numbers (i.e. -1, -2, -3, -4, etc) are known as Integers.

Rational Numbers
Numbers which can be written in fraction are rational numbers like P/Q.

Irrational numbers
Numbers which can not be written in fraction are irrational numbers like root

Even numbers
Numbers which are divisible by 2 are even numbers. 2, 4, 6, 8 

Odd numbers
Numbers which are not divisible by 2 are odd numbers. 1, 3, 5, 7,

Prime numbers
Numbers which are greater than 1 and have only two factors that 1 and the number it self are known as prime number. 2, 3, 5, 

Composite numbers
Numbers which are greater than one and are not prime numbers are known as composite numbers. So these numbers have more than two factor. 4, 6, 8, 9,

Number system is an important topic for all the enetrance and competitive exams like CLAT, NLU, BBA, SSB, UPSC. These concepts need high level of practice for a student to be well versed with this topic. Due to this reason students must practice as many mock test as possible. These Online MCQ mock test and MCQ questions cover all the important concepts for CLAT and  NLU entrance exam.

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