# Tag Archives: Aptitude

## Sum of n terms of a sequence

If nth term of a sequence is given by Tn=an3+bn2+cn+d where a, b, c, d are constants then sum of n terms. Sn = a*Σ(n3)+b*Σ(n2)+c*Σ(n)+Σ(d)… Read More »

These are following important points about circle in geometry : Equation of circle having center at (0, 0) and radius r : x2+y2=r2 Equation of… Read More »

## Finding the LCM and HCF of decimal numbers

Finding the LCM and HCF are most frequently asked questions in any competitive exams. Finding LCM and HCF for natural numbers are taught in our… Read More »

## Finding reminder of a large number

Number System is an important concept for solving GATE Aptitude questions and aptitude for entrance exams for different companies. The below is an important question… Read More »

## Mensuration 3D- Hollow sphere

In this article we shall calculate the volume, Curved surface area (CSA) and Total surface area of a hollow sphere or a spherical shell. Below… Read More »

## Program to find the last digit of X in base Y

Given a positive integer X and Y, the task is to find the last digit of X in the given base Y. Examples: Input: X… Read More »

## Find number of candidates in the Exam

Given the last rank ‘L’ and number of candidates at the last rank ‘T’, the task is to find the total number of candidates in… Read More »

## Count of N digit numbers possible which satisfy the given conditions

Given an integer N, the Task is to find the total number of N digit numbers possible such that: All the digits of the numbers… Read More »

## GRE Data Analysis | Data Interpretation Examples

Data Interpretation simply means to understand given data and transforming the same data into the desired property. Data given can be in any form from… Read More »

## Number of hours after which the second person moves ahead of the first person if they travel at a given speed

Given three integers A, B and K. Initially, the first person was ahead of the second person by K kms. In every hour, the first… Read More »

## GRE Data Analysis | Methods for Presenting Data

Data Interpretation Question in GRE will require the knowledge of understanding Data Representation methods. It is very Important to understand data correctly and apply the… Read More »

## GRE Data Analysis | Counting Methods

Counting is the process of determining the number of elements of a finite set of objects. If set contains small number of objects/elements then it… Read More »

## GRE Algebra | Coordinate Geometry

In the coordinate geometry, all the points are located on the coordinate plane. Coordinate plane is also called xy-plane. The concepts of xy-plane are: The… Read More »

## GRE Data Analysis | Distribution of Data, Random Variables, and Probability Distributions

Distribution of Data: The distribution of a statistical data set (or a population) is a listing or function showing all the possible values (or intervals)… Read More »

## GRE Data Analysis | Numerical Methods for Describing Data

Data can be described numerically by various statistics, or statistical measures. These statistical measures are often grouped in 3 categories: 1. Measures of central tendency… Read More »