In compound interest, where the interest for each period is added to the principal before interest is calculated for the next period. With this method the principal grows as the interest is added to it. This method is used in investments such as savings account and bonds.
A boat is said to go downstream if it is moving along the direction of the stream. The net speed of the boat in this case is called downstream speed. A boat is said to go upstream if it is moving in the direction opposite to the direction of the stream. The net speed of the boat in this case is called upstream speed.
Number Systems forms the base for Quantitative Ability and clearing of concepts is important for CAT and other management exams. A measurement carried out, of any quantity, leads to a meaningful value called the Number. This value may be positive or negative depending on the direction of the measurement and can be represented on the number line.
A divisibility rule is a method to determine whether a given integer is divisible by a fixed divisor without performing the division. You can do this by examining the digits of the integer.
The terms percent means for every hundred. Percentage is a way of expressing a number as a fraction of 100. It is denoted by using the percent sign, %. For example, when a person made a profit of 20 percent, it means that the person gained Rs. 20 for every hundred rupees invested in the business. Scoring 60 percent marks means out of every 100 marks the candidate scored 60 marks.
The lending and borrowing of money involves the concept of simple interest and compound interest. If you borrow money for certain period of time, you have to return the borrowed sum of money (Principal) with some extra money. This extra money is called Interest.
The terms "Time" and "Distance" are related to the speed of a moving object. The questions on speed, time and distance are based on one general formula: Distance = Speed × Time
In daily life, there are situations where we need to complete a particular job in a reasonable time. We have to complete the project earlier or later depending upon the needs. Accordingly, the men on duty have to be increased or decreased. The time and the men engaged for a project are inversely proportional to each other. The more the number of men involved, the lesser is the time required to finish a job.
Average is defined as the ratio of sum of the quantities to the number of quantities. Average or mean is said to be a measure of central tendency.
Ratio is a relation between two quantities or numbers. It is a relation that one quantity bears to another with respect to magnitude. A ratio of a and b is denoted by a:b and is read as a is to b. In a ratio, the first part (a) is called antecedent and second part (b) is called consequent.
A Linear Equation is an equation whose graph is a straight line. Each term has a degree of atmost 1. Each term can have degree 0 (constant term) or degree 1. A linear equation in one variable is an equation that involves only one variable x. Geeral form of linear equation can be written as ax + b = 0. There are no higher or lower order terms such as x2, x3 or x1/2.
A Progression is a sequence of numbers which have some kinf of relation. This relation determines what kind of a progression is. Generally, there are two types of progressions:
Binomial Expression: An algebraic expression consisting of two terms with a positive or negative sign between them. Example: (x+y)
A comparison relationship between two algebraic expressions or quantities is known as an Inequalities.
Combination & Permutation deals with arrangement of thing. If the order doesn't matter, then it is called Combination. If the order does matter, then it is a Permutation.
Geometry is branch of mathematics concerned with shapes, sizes and properties of figures. Geometry includes knowledge of angles, lines, triangles, quadrilaterals, circles and polygons.
Two figures are said to be similar, if they have the same shape but not necessarily the same size. If the angles of one triangle are equal to the angles of another triangle, then the triangles are said to be Equiangular. Equiangular triangles have the same shape but may have different sizes. Therefore, equiangular triangles are also called Similar Triangles.
A square has four equal sides and four equal angles (90 degree angles or right angles). A rectangle is a quadrilateral with 4 right angles. It is similar to square except that its sides are not equal.
A circle is a locus of all points which are equidistant from a point. If O is a fixed point in a given plane, the set of points in the plane which are at equal distances from O will form a circle.