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# Category Archives: ALGEBRA

## TYPES OF NUMBERS

In our everyday life we see and use different kind of number. Some of they are positive, some are negative, some of them are fraction and so on.

**Natural Numbers:**

The group of numbers which start from 1 is known as Natural Numbers. It can also be defined as those numbers which we used in our daily life for counting are known as Natural Numbers. Examples of Natural Numbers are 1, 2, 3, 4, 5, 6,34, 69, 1001 and so on.Group of Natural Numbers are denoted by ‘N’. The smallest Natural Number is 1. (more…)

## FRACTIONS

A fraction is a number in the form of a/b where a and b are whole numbers and b is not equal to 0. Example of fractions are ½, 2/4 and 7/3.

## Types of Fractions

Fractions can be classified into many classes. (more…)

## SETS THEORY

George Cantor the German mathematician developed the theory of Set during 1874 to 1884. Nowadays the set theory is used in almost every branches of mathematics. Set theory is one of the branches of modern algebra. A set can be defined as a collection of well-defined and well distinguished objects.By “ well-defined ” we mean that it must be possible to tell about objects without any doubt. For example the collection of students is a well-defined collection while the collection of good student is not a well-defined collection because good students are vague (not clear). All sets are denoted by capital English alphabets e.g. A, B, C, X, Y, Z etc. The following are some common examples of set. (more…)

## DIVISIBILITY RULES FOR A NUMBER

Before I start writing divisibility rules we must be familiar with what is the meaning of divisibility. A number is said to be divisible by the numbers that divide it without leaving a remainder. That means if the remainder is 0 then the number is said to be divisible.

## DIVISIBILITY BY 2

A number is said to be divisible by 2 when it is an Even number. A number is said to be Even number when ones digit of the number is any one from 0, 2, 4, 6 or 8. We can say that 36, 68, 112, 1150 and 56894 are all divisible by 2. Because each of them are Even. (more…)