Quantitative Ability_Linear and Quadratic Equations10/06/2015

There were P people in a room when a meeting started. Q people left the room during the first hour, while R people entered the room during the same time. What expression gives the number of people in the room after the first hour as a percentage of the number of people in the room who have been there since the meeting started?

  1. (P - Q)/(P - Q + R) 
  2. 100 *  (P - Q + R)/ (P - Q) 
  3. (P + R)/ (P - Q)
  4. 100 * (P - Q)/(P - Q + R)
  5. 100 * (P + R)/(P - Q)
Quantitative Ability_Linear and Quadratic Equations10/06/2015

A charity solicited P persons over the phone who agreed to an average pledge of Rs.R each. Q of these people who had pledged an average of Rs. S each never sent in the pledged amount. Which of the following expressions represents the percentage of pledged money that the charity received?

  1. 100 * (PR/QS)
  2. 100 * (QS/PR)
  3. 100 (PR - QS)
  4. 100(1 - (QS/PR))
  5. 100 ( PR - (QS/PR))
Quantitative Ability_Linear and Quadratic Equations10/06/2015

A clothing manufacturer has determined that she can sell 100 suits a week at a selling price of Rs. 200 each. For each rise of Rs. 4 in the selling price she will sell 2 less suits a week. If she sells the suits for Rs. x each, how many rupees a week will she receive from the sales of the suits?

  1. x/ 2
  2. 200-  (x/2)
  3. 50x -  x/ 2
  4. 150x -  x/ 2
  5. 200x - x/ 2
Quantitative Ability_Linear and Quadratic Equations10/06/2015

It costs Rs. x each to make the first thousand copies of a compact disk and Rs. y to make each subsequent copy. If z is greater than 1,000, how many Rupees will it cost to make z copies of the compact disk?

  1. 1,000 x + yz
  2. zx - zy
  3. 1,000 (z - x) + xy
  4. 1,000 (z - y) + xz
  5. 1,000 (x - y) + yz
Quantitative Ability_Linear and Quadratic Equations10/06/2015

Jack has three more cards than Bill. Together they have 47 cards. If x represents the number of cards Bill has, then an equation that can be used to determine the number of cards each one has is

  1. x + 3 = 47
  2. 2x + 3 = 47
  3. x - 3 = 47
  4. 2x - 3 = 47
  5. 3x + 3 = 47