Quantitative Interview Questions

• To 15 lts of water containing 20% alcohol, we add 5 lts of pure water. What is % alcohol.
  http://www.coolinterview.com/interview/4748/
  
  
• The length of the side of a square is represented by x+2. The length of the side of an equilateral triangle is 2x. If the square and the equilateral triangle have equal perimeter, then the value of x is _______.
  http://www.coolinterview.com/interview/4839/
  
  
• Pipe A can fill in 20 minutes and Pipe B in 30 mins and Pipe C can empty the same in 40mins. If all of them work together, find the time taken to fill the tank
  http://www.coolinterview.com/interview/4724/
  
  
• A man leaves office daily at 7pm A driver with car comes from his home to pick him from office and bring back homeOne day he gets free at 5:30 and instead of waiting for driver he starts walking towards home. In the way he meets the car and returns home on car He reaches home 20 minutes earlier than usual.In how much time does the man reach home usually??
  http://www.coolinterview.com/interview/4730/
  
  
• 20% of a 6 litre solution and 60% of 4 litre solution are mixed. What percentage of the mixture of solution
  http://www.coolinterview.com/interview/4741/
  
  
• 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?
  http://www.coolinterview.com/interview/4855/
  
  
• There are two circles, one circle is inscribed and another circle is circumscribed over a square. What is the ratio of area of inner to outer circle?
  http://www.coolinterview.com/interview/4739/
  
  
• Three cards are drawn at random from an ordinary pack of cards. Find the probability that they will consist of a king, a queen and an ace.
  http://www.coolinterview.com/interview/4720/
  
  
• City A's population is 68000, decreasing at a rate of 80 people per year. City B having population 42000 is increasing at a rate of 120 people per year. In how many years both the cities will have same population?
  http://www.coolinterview.com/interview/4740/
  
  
• What is the selling price of a car? If the cost of the car is Rs.60 and a profit of 10% over selling price is earned
  http://www.coolinterview.com/interview/4755/
  
  
• A boy has Rs 2. He wins or loses Re 1 at a time If he wins he gets Re 1 and if he loses the game he loses Re 1. He can loose only 5 times. He is out of the game if he earns Rs 5. Find the number of ways in which this is possible?
  http://www.coolinterview.com/interview/4728/
  
  
• Mr. Shah decided to walk down the escalator of a tube station. He found that if he walks down 26 steps, he requires 30 seconds to reach the bottom. However, if he steps down 34 stairs he would only require 18 seconds to get to the bottom. If the time is measured fromthe moment the top step begins to descend to the time he steps off the last step at the bottom, find out the height of the stair way in steps?
  http://www.coolinterview.com/interview/4722/
  
  
• With just six weights and a balance scale, you can weigh any unit number of kgs from 1 to 364. What could be the six weights?
  http://www.coolinterview.com/interview/4766/
  
  
• If x=y=2z and xyz=256 then what is the value of x?
  http://www.coolinterview.com/interview/4725/
  
  
• How big will an angle of one and a half degree look through a glass that magnifies things three times?
  http://www.coolinterview.com/interview/4763/
  
  
• Mr. and Mrs. Aye and Mr. and Mrs. Bee competed in a chess tournament.Of the three games played:a)In only the first game werethe two players married to each other.b)The men won two games and the women won one game.c)The Ayes won more games than the Bees.d)Anyone who lost game did not play the subsequent game.Who did not lose a game?
  http://www.coolinterview.com/interview/4758/
  
  
• A student divided a number by 2/3 when he required to multiply by 3/2. Calculate the percentage of error in his result.
  http://www.coolinterview.com/interview/4854/
  
  
• If there are 1024*1280 pixels on a screen and each pixel can have around 16 million colors. Find the memory required for this?
  http://www.coolinterview.com/interview/4727/
  
  
• If on an item a company gives 25% discount, they earn 25% profit. If they now give 10% discount then what is the profit percentage.
  http://www.coolinterview.com/interview/4738/
  
  
• A dishonest shopkeeper professes to sell pulses at the cost price, but he uses a false weight of 950gm. for a kg. His gain is____%.
  http://www.coolinterview.com/interview/4853/
  
  
• In objective test a correct ans score 4 marks and on a wrong ans 2 marks are subtracted, a student score 480 marks from 150 question. how many ans were correct?
  http://www.coolinterview.com/interview/4731/
  
  
• The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?
  http://www.coolinterview.com/interview/4721/
  
  
• Solve for x and y: 1/x - 1/y = 1/3, 1/x2 + 1/y2 = 5/9.
  http://www.coolinterview.com/interview/4820/
  
  
• If Log2 x - 5 Log x + 6 = 0, then what would the value / values of x be?
  http://www.coolinterview.com/interview/4718/
  
  
• A number of cats got together and decided to kill between them 999919 mice. Every cat killed an equal number of mice. Each cat killed more mice than there were cats. How many cats do you think there were ?
  http://www.coolinterview.com/interview/4719/
  
  
• A man was engaged on a job for 30 days on the condition that he would get a wage of Rs. 10 for the day he works, but he have to pay a fine of Rs. 2 for each day of his absence. If he gets Rs. 216 at the end, he was absent for work for ... days.
  http://www.coolinterview.com/interview/4851/
  
  
• The price of a product is reduced by 30% . By what percentage should it be increased to make it 100%
  http://www.coolinterview.com/interview/4753/
  
  
• A worker is paid Rs.20/- for a full days work. He works 1,1/3,2/3,1/8.3/4 days in a week. What is the total amount paid for that worker ?
  http://www.coolinterview.com/interview/4747/
  
  
• Two trains move in the same direction at 50 kmph and 32 kmph respectively. A man in the slower train observes the 15 seconds elapse before the faster train completely passes by him. What is the length of faster train ?
  http://www.coolinterview.com/interview/4735/
  
  
• If PQRST is a parallelogram what it the ratio of triangle PQS & parallelogram PQRST
  http://www.coolinterview.com/interview/4750/