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s Predict the output or error(s) for the following: 1.    void main() {             int  const * p=5;         ... Read More

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Problems on Numbers Simple problems: 1.What least number must be added to 3000 to obtain a number exactly divisible by 19? Solution: On dividing 3000 by 19 we get 17 as remainder Therefore number to be added = 19-17=2. 2... Read More

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Predict the output or error(s) for the following: 1.     struct aaa{ struct aaa *prev; int i; struct aaa *next; }; main() {  struct aaa abc,def,ghi,jkl;  int x=100;  abc.i=0;abc.prev=... Read More

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Reasoning Reasoning CLASSIFICATION TYPE Read the following information carefully and answer the questions that follow: 1) There are six cities A,B,C,D,E and F A is not a hill station. B and E are not historical... Read More

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Oddman Out and Series Introduction: In any type of problems,a set of numbers is given in such a way that each one except one satiesfies a particular definite property.The one which does not satisfy that... Read More

Ratio and Proportions Important Facts: Ratio: The ratio of two qualities a and b in the same units, is the fraction a/b and we write it as a:b. In the ratio, a:b, we call ‘a’ as the first term of antecedent and b, the... Read More

Brain Teaser Puzzle game or brain teaser is very usefull to develop your logical thinking and fast problem solving Try to get 56 in all the red boxes, using the pull-down lists! ... Read More

H.C.F and L.C.M Facts And Formulae: Highest Common Factor:(H.C.F) or Greatest Common Meaure(G.C.M) : The H.C.F of two or more than two numbers is the greatest number that divides each of them exactly. There are two methods :... Read More

Cards are there. U have to arrange them in a 3*3 matrix. Cards are of 4 colors.they are red,yellow,blue,green. Conditions for arrangement: one red card must be in first row Or second row.2 green cards... Read More

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Time and Distance Formulae: I)Speed = Distance/Time II)Time = Distance/speed III) Distance = speed*time IV) 1km/hr = 5/18 m/s V)1 m/s = 18/5 Km/hr VI)If the ratio of the speed of A and B is a:b,then the ratio of ... Read More

Problems on Ages Simple problems: 1.The present age of a father is 3 years more than three times the age of his son.Three years hence,father’s age will be 10 years more than twice the age of the son.Find the... Read More

1. If all the 6 are replaced by 9, then the algebraic sum of all the numbers from 1 to 100(both inclusive) varies by Ans: 330 2. The total no. of numbers that are divisible by 2 or 3 between 100 and 200(both inclusive) are Ans:67 3. From a pack... Read More

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Pipes and Cisterns Important Facts: 1.INLET:A pipe connected with a tank or cistern or a reservoir, that fills it, it is known as Inlet. OUTLET:A pipe connected with a tank or a cistern or a reservoir, ... Read More

Aptitude Interview Questions Use your mind to solve the questions otherwise all answers given at the end of all questions 1). If each edge of a cube is increased by 50%, find the percentage increase in its surface area. 2). Find the... Read More

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Permutations and Combinations Formulae: Factorial Notation: Let n be positive integer.Then ,factorial n dentoed by n! is defined as n! = n(n-1)(n-2). . . . . . . .3.2.1 eg:- 5! = (5 * 4* 3 * 2 * 1) ... Read More

Aptitude Questions 1.If 2x-y=4 then 6x-3y=? (a)15 (b)12 (c)18 (d)10 Ans. (b) 2.If x=y=2z and xyz=256 then what is the value of x? (a)12 (b)8 (c)16 (d)6 Ans. (b) 3. (1/10)18 - (1/10)20 = ? (a) 99/1020 (b) 99/10 (c) 0.9 (d) none... Read More

You are given two candles of equal size, which can burn 1 hour each. You have to measure 90 minutes with these candles. (There is no scale or clock). Also u r given a lighter. Ans: 1. First light up the two ends of the 1st candle. When it... Read More

SURDS AND INDICES Simple problems: 1. Laws of Indices: (i) am * an = a(m+n) (ii) am / an = a(m-n) (iii) (am)n = a(m*n) (iv) (ab)n = an * bn (v) (a/b)n = an / bn ... Read More

Probability Introduction: Experiment: An operation which can produce some well-defined outcome is called an experiment. Random Experiment: An experiment in which all possible out comes are known and the exact output cannot... Read More

Calenders Important Facts and Formulae: a) Odd Days : The number of days more than the complete number of weeks in a given period is number of odd days during that period. b) Leap year : Every year which is divisible by 4 is... Read More

Problems on Percentages Simple problems: 1 . Express the following as a fraction. a) 56% SOLUTION: 56/100=14/25 b) 4% SOLUTION: 4/100=1/25 c) 0... Read More

Compound Intrest Important Facts and Formulae: Compound Interest: Sometimes it so happens that the borrower and the lender gree to fix up a certain unit of time ,say yearly or half-yearly or quarterly to settle the previous... Read More

Numbers Introduction: Natural Numbers: All positive integers are natural numbers. Ex 1,2,3,4,8,...... There are infinite natural numbers and number 1 is the least natural number. Based on divisibility there would be two... Read More

Time and Work Important Facts: 1.If A can do a piece of work in n days, then A’s 1 day work=1/n 2.If A’s 1 day’s work=1/n, then A can finish the work in n days. Ex: If A can do a piece of work in 4 days,then... Read More

Simple Intrest Important Facts and Formulae: Principal or Sum:- The money borrowed or lent out for a certain period is called Principal or the Sum. Interest:- Extra money paid for using others money is called Interest. ... Read More

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Averages Formula: 1.Average=Sum of quantities/Number of quantities. 2.Suppose a man covers a certain distance at x kmph and an equal distance at y kmph ,then the average speed during the whole journey is (2xy/x+y) kmph. ... Read More

Square and Cube Roots Formula: The Product of two same numbers in easiest way as follow. Example:let us calculate the product of 96*96 Solution: Here every number must be compare with the 100. See here the given number 96 which is 4... Read More

Bankers Discount Formulae: i. Suppose a merchant A buys goods worth Rs.10000 from another merchant B at a credit of say 5 months ii.Then,B prepares a bill , called the bill of exchange iii. A... Read More

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Aptitude Questions With Answers for Time & Distance Problems 1)A train covers a distance in 50 min ,if it runs at a speed of 48kmph on an average.The... Read More

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Simplifications Introduction: ’BODMAS’ rule: This rule depicts the correct sequence in which the operations are to be executed, so as to find out the value of a given expression. Here B stands for Bracket, O for Of, D... Read More

Partnership Important Facts: Partnership:When two or more than two persons run a business jointly, they are called partners and the deal is known as partnership. Ratio of Division of Gains: 1.When the investments of all the... Read More

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Areas Important Facts and Formulae: Results On Triangle 1.Sum of the angles of a triangle is 180 degrees. 2.The sum of any two sides of a triangle is greater than third side. 3.Pythagoras Theorem: In a right angled... Read More

Trains General Concept: (1) Time taken by a train x mt long in passing a signal post or a pole or a standing man = time taken by the train to cover x mt (2) Time taken by a train x mt long in passing a stationary object of... Read More

1.Three types of tea the a,b,c costs Rs. 95/kg,100/kg and70/kg respectively. How many kgs of each should be blended to produce 100 kg of mixture worth Rs.90/kg, given that the quntities of band c are equal a)70,15,15 b)50,25,25 c)60,20,20 d)40... Read More

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Clocks General Concepts: The face or dial of a watch is a circle whose circumference is divided into 60 equal parts,called minute spaces. A clock has two hands, the Smaller one is called the hour hand or short hand while the... Read More

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Puzzles Introduction: Puzzles are dealt in a detailed manner with certain solutions. Different puzzles are gathered from ShakuntalaDevi’s puzzle books. Keeping in mind certain puzzles for Infosys some reasoning... Read More

Profit and Loss Important Facts: Cost Price: The price at which an article is purchased, is called its cost price,abbreviated as C.P. Selling Price: The price at which an article is sold, is called its selling price,abbreviated... Read More

Hans is standing behind Gerrie and at the same time Gerrie is standing behind Hans. How is this possible ? A cyclist drove one kilometer, with the wind in his back, in three minutes and drove the same way back, against the wind... Read More

Q.  A, B and C can complete a piece of work in 24, 6 and 12 days respectively. Working together, they will complete the same work in: ... Read More

If 2x-y=4 then 6x-3y=? (a)15 (b)12 (c)18 (d)10 Ans. (b) If x=y=2z and xyz=256 then what is the value of x? (a)12 (b)8 (c)16 (d)6 Ans. (b) Pipe A can fill in 20 minutes and Pipe B in 30 mins and Pipe C can empty the... Read More

A three digit number consists of 9,5 and one more number . When these digits are reversed and then subtracted from the original number the answer yielded will be consisting of the same digits arranged yet in a different order. What is the other... Read More

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Decimal Fractions 1.Decimal fractions: Fractionin which denominations are powers of 10 are decimal fractions. Example:1 /10 = 0.1, 1 / 100 = 0.01 2.Convertion of Decimal into fraction:- Example: 0.25 = 25/100 = 1/4 3.i)... Read More

1.There is a game which is being played by 2 persons A and B. The 2 players start the game keeping identical 50 paise coins on a blank board alternately. The 50 paise coins can be kept in the board such that no part of the coin is outside... Read More

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Boats and Streams Important facts: 1)In water, the direction along the stream is called down stream. 2)Direction against the stream is called upstream. 3)The speed of boat in still water is U km/hr and the speed of stream... Read More

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If 2x-y=4 then 6x-3y=? (a)15 (b)12 (c)18 (d)10 Ans. (b) If x=y=2z and xyz=256 then what is the value of x? (a)12 (b)8 (c)16 (d)6 Ans. (b) (1/10)18 - (1/10)20 = ? (a) 99/1020 (b) 99/10 (c) 0.9 (d) none... Read More

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One of the following is my secret word: AIM DUE MOD OAT TIE. With the list in front of you, if I were to tell you any one of my secret word, then you would be able to tell me the number of vowels in my secret word. Which is my secret word? ... Read More

A three digit number consists of 9,5 and one more number . When these digits are reversed and then subtracted from the original number the answer yielded will be consisting of the same digits arranged yet in a different order. What is the other... Read More

1.With how few assistants can an intrepid explorer make a 6 day crossing on foot of an absolutelybarren desert, if he and the available assistants can each carry only enough food and water to last one man four days? Look for the simplest humane soln.... Read More

Races and Games of Skill Important Facts and Formulae: Races: A contest of speed in running ,riding,driving,sailing or rowing is called a Race Race Course: The ground or path on which contests are made is called a race... Read More

The elements of accounting are Assets, Liabilities, and Owner Equities. The way to remember this would be through the acronym ALOE The accounting equation is Assets = Liabilities + Owners’ Equities Read More

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Chain Rule Important Facts: Direct Proportion: Two Quantities are said to be directly proportional, if on the increase (or decrease) of th one, the other increases(or decreases) to the same extent. Ex:(i) Cost is directly... Read More

It was calculated that 75 men could complete a piece of work in 20 days. When work was scheduled to commence, it was found necessary to send 25 men to another project. How much longer will it take to complete the work? Answer: 30 days. ... Read More

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Alligation or Mixtures Important Facts and Formulae: 1.Allegation:It is the rule that enables us to find the ratio in which two of more ingredients at the given price must be mixed to produce a mixture of a desired price. 2... Read More

Q : A takes twice as much time as B or thrice as much time as C to finish a piece of work. Working together, they can finish the work in 2 days. B can do the work alone in: Explanation: ... Read More

Here are three answers: Answer A Answer A or B Answer B or C There is only one correct answer to this question. Which answer is this? If answer A would be correct, then answer B ("Answer A or B") would also be correct. If answer B would be... Read More

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