Math

Questions 1: If Logx (1 / 8) = - 3 / 2, then x is equal to A. - 4 B. 4 C. 1 / 4 D. 10  Question 2: 20 % of 2 is equal to A. 20 B. 4 C. 0.4 D. 0.04  Questions 3: If Log 4 (x) = 12, then log 2 (x / 4) is equal to A. 11 B. 48 C. -12 D. 22  Questions 4: The population of a country increased by an average of 2% per year from 2000 to 2003. If the population of this country was 2 000 000 on December 31, 2003, then the population of this country on January 1, 2000, to the nearest thousand would have been A. 1 846 000 B. 1 852 000 C. 1 000 000 D. 1 500 000  Questions 5: f is a quadratic function whose graph is a parabola opening upward and has a vertex on the x-axis. The graph of the new function g defined by g(x) = 2 - f(x - 5) has a range defined by the interval A. [ -5 , + infinity) B. [ 2 , + infinity) C. ( - infinity , 2] D. ( - infinity , 0]  Questions 6: f is a function such that f(x) < 0. The graph of the new function g defined by g(x) = | f(x) | is a reflection of the graph of f A. on the y axis B. on the x axis C. on the line y = x D. on the line y = - x  Questions 7: If the graph of y = f(x) is transformed into the graph of 2y - 6 = - 4 f(x - 3), point (a , b) on the graph of y = f(x) becomes point (A , B) on the graph of 2y - 6 = - 4 f(x - 3) where A and B are given by A. A = a - 3, B = b B. A = a - 3, B = b C. A = a + 3, B = -2 b D. A = a + 3, B = -2 b +3  Questions 8: When a parabola represented by the equation y - 2x 2 = 8 x + 5 is translated 3 units to the left and 2 units up, the new parabola has its vertex at A. (-5 , -1) B. (-5 , -5) C. (-1 , -3) D. (-2 , -3)  Questions 9: The graphs of the two linear equations ax + by = c and bx - ay = c, where a, b and c are all not equal to zero, A. are parallel B. intersect at one point C. intersect at two points D. perpendicular  Questions 10: The graphs of the two equations y = a x 2 + b x + c and y = A x 2 + B x + C, such that a and A have different signs and that the quantities b 2 - 4 a c and B 2 - 4 A C are both negative, A. intersect at two points B. intersect at one point C. do not intersect D. none of the above  Questions 11: For x greater than or equal to zero and less than or equal to 2 pi, sin x and cos x are both decreasing on the intervals A. (0 , pi/2) B. (pi/2 , pi) C. (pi , 3 pi / 2) D. (3 pi / 2 , 2 pi)  Questions 12: The three solutions of the equation f(x) = 0 are -2, 0, and 3. Therefore, the three solutions of the equation f(x - 2) = 0 are A. - 4, -2, and 1 B. -2, 0 and 3 C. 4, 2, and 5 D. 0, 2 and 5  Questions 13: The three solutions of the equation f(x) = 0 are - 4, 8, and 11. Therefore, the three solutions of the equation f(2 x) = 0 are A. - 2, 4, and 11/2 B. - 8, 16 and 22 C. - 4, 8, and 11 D. 2, 19 / 2 and 7 / 2  Questions 14: A school committee consists of 2 teachers and 4 students. The number of different committees that can be formed from 5 teachers and 10 students is A. 10 B. 15 C. 2100 D. 8  Questions 15: Five different books (A, B, C, D and E) are to be arranged on a shelf. Books C and D are to be arranged first and second starting from the right of the shelf. The number of different orders in which books A, B and E may be arranged is A. 5! B. 3! C. 2! D. 3! * 2!  Questions 16: The mean of a data set is equal to 10 and its standard deviation is equal to 1. If we add 5 to each data value, then the mean and standard deviation become A. mean = 15 , standard deviation = 6 B. mean = 10 , standard deviation = 6 C. mean = 15 , standard deviation = 1 D. mean = 10 , standard deviation = 1  Questions 17: The exam scores of all 500 students were recorded and it was determined that these scores were normally distributed. If Jane's score is 0.8 standard deviation above the mean, then how many, to the nearest unit, students scored above Jane? A. 394 B. 250 C. 400 D. 106  Questions 18: If f(x) is an odd function, then | f(x) | is A. an odd function B. an even function C. neither odd nor even D. even and odd  Questions 19: The period of | sin (3x) | is A. 2 pi B. 2 pi / 3 C. pi / 3 D. 3 pi  Questions 20: When a metallic ball bearing is placed inside a cylindrical container, of radius 2 cm, the height of the water, inside the container, increases by 0.6 cm. The radius, to the nearest tenth of a centimeter, of the ball bearing is A. 1 cm B. 1.2 cm C. 2 cm D. 0.6 cm  Questions 21: The period of 2 sin x cos x is A. 4 pi 2 B. 2 pi C. 4 pi D. pi  Questions 22: The probability that an electronic device produced by a company does not function properly is equal to 0.1. If 10 devices are bought, then the probability, to the nearest thousandth, that 7 devices function properly is A. 0.057 B. 0.478 C. 0.001 D. 0  ANSWERS TO ABOVE QUESTIONS 1b, 2c, 3d, 4a, 5c, 6b, 7d, 8a, 9d, 10c 11b, 12d, 13a, 14c, 15b, 16c, 17d, 18b, 19c, 20b 21d, 22a.   1. What is the next prime number after 7? 2. The perimeter of a circle is also known as what? 3. 65 – 43 = ? 4. True or false? A convex shape curves outwards. 5. What does the square root of 144 equal? 6. True or false? Pi can be correctly written as a fraction. 7. What comes after a million, billion and trillion? 8. 52 divided by 4 equals what? 9. What is the bigger number, a googol or a billion? 10. True or false? Opposite angles of a parallelogram are equal. 11. 87 + 56 = ? 12. How many sides does a nonagon have? 13. True or false? -2 is an integer. 14. What is the next number in the Fibonacci sequence: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, ? 15. 7 x 9 = ? 16. True or false? In an isosceles triangle all sides are unequal. 17. In statistics, the middle value of an ordered set of values is called what? 18. What does 3 squared equal? 19. True or false? -4 is a natural number. 20. 5 to the power of 0 equals what? Math Quiz Answers 1. 11 2. The circumference 3. 22 4. True 5. 12 6. False 7. A quadrillion 8. 13 9. A googol 10. True 11. 143 12. 9 13. True 14. 55 15. 63 16. False (2 sides are equal) 17. The median 18. 9 19. False 20. 1