Test your basic knowledge |

GRE Math: Common Errors

Subjects : gre, math
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. If the 80th percentile of the measurements is 72degrees - about how many measurments are between 69 degrees and 72 degrees? Round your answer to the nearest tenth






2. Can you add sqrt 3 and sqrt 5?






3. A triangle is inscribed in a semi circle with legs 5 and 12. What is the circumfermence of the semicircle?






4. Can the input value of a function have more than one output value (i.e. x: y - y1)?






5. If 10800 is invested at a simple interest rate of 4% - what is the value of the investment after 18 months?






6. If a=-1 and b=3 - what is the value of (4(a^3)(b^2) - 12(a^2)(b^5)) / (16(a^3)(b^2))?






7. What is the 'domain' of a function?






8. (a^-1)/a^5






9. A number is divisible by 3 if ...






10. What is the formula for compounded interest?






11. What is an exterior angle?






12. There are 10 finalists for the school spelling bee. A first - second - and third place trophy will be awarded. In how many ways can the judges award the 3 prizes?






13. When the 'a' in the parabola is negative...






14. Legs 5 - 12. Hypotenuse?






15. Is 0 even or odd?






16. What is it called when a point is reflected to the quadrant opposite it (i.e. I to III or II to IV)?






17. 1:sqrt3:2 is the ratio of the sides of what kind of triangle?






18. What are the smallest three prime numbers greater than 65?






19. What is the maximum value for the function g(x) = (-2x^2) -1?






20. The ratio of the areas of two similar polygons is ...






21. If an inequality is multiplied or divided by a negative number....






22. Legs 6 - 8. Hypotenuse?






23. A number is divisible by 9 if...






24. What is the absolute value function?






25. Simplify the expression [(b^2 - c^2) / (b - c)]






26. How to find the area of a sector?






27. Evaluate and write as a mixed number: 2/7 - 3/21 + 2 & 4/14






28. T or F? Given d -e &f =/ 0 - [(d^3)e(f^5)] / 2d(e^3) / [3(d^2)(e^3)(f^7)] / [6(e^5)(f^2)]?






29. There are 10 finalists for the school spelling bee. A first - second - and third place trophy will be awarded. How many different people can get the three prizes?






30. Can you simplify sqrt72?






31. What is the graph of f(x) shifted right c units or spaces?






32. Legs: 3 - 4. Hypotenuse?






33. A brick with dimensions 10. 15 and 25 weighs 1.5 kg. A second brick (same density) has dimensions 12 - 18 - and 30. What is the weight of the second brick?






34. In similar hexagons - the ratio of the areas is 16:25. What is the ratio of their corresponding sides?






35. Solve the quadratic equation ax^2 + bx + c= 0






36. What is the empty set?






37. What is a subset?






38. What is a chord of a circle?






39. The objects in a set are called two names:






40. If the two sides of a triangle are unequal then the longer side...






41. Simplify 9^(1/2) X 4^3 X 2^(-6)?






42. 413.03 x 10^(-4) =






43. Describe the relationship between the graphs of x^2 and (1/2)x^2






44. What is a tangent?






45. What is the common monomial factor in the expression 4(c^3)d - (c^2)(d^2) + 2cd?






46. Reduce: 4.8 : 0.8 : 1.6






47. What are complementary angles?






48. For what values should the domain be restricted for the function f(x) = sqrt(x + 8)






49. When the 'a' in a parabola is positive....






50. Nine coins are tossed simultaneously. In how many of the outcomes will the fourth coin tossed show heads?