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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. 1/8 in percent?






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






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






4. How to determine percent decrease?






5. What is the percent formula?






6. 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)]?






7. A cylinder has surface area 22pi. If the cylinder has a height of 10 - what is its radius?






8. What is the ratio of the sides of a 30-60-90 triangle?






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






10. What is an exterior angle?






11. 60 < all primes <70






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






13. What is the ratio of the surface area of a cube with an edge of 10 to the surface area of a rectangular solid with dimensions 2 - 4 - and 6?






14. The four angles around a point measure y - 2y - 35 and 55 respectively. What is the value of y?






15. What is the area of a regular hexagon with side 6?






16. 1:sqrt3:2 is the ratio of the sides of what kind of triangle?






17. 8.84 / 5.2






18. What are complementary angles?






19. What is the 'union' of A and B?






20. What is a parabola?






21. What is the sum of the angles of a triangle?






22. x^2 = 9. What is the value of x?






23. 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






24. 2sqrt4 + sqrt4 =






25. Which is greater? 64^5 or 16^8






26. Suppose you have a set of n objects - and you want to select k of them - but the order doesn'T matter. What formula do you use to determine the number of combinations of n objects taken k at a time?






27. 40 < all primes<50






28. Which quandrant is the lower right hand?






29. What is the 'Solution' for a set of inequalities.






30. Area of a triangle?






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






32. 4.809 X 10^7 =






33. Legs 5 - 12. Hypotenuse?






34. How to find the area of a sector?






35. 1/6 in percent?






36. What are 'Supplementary angles?'






37. From a box of 12 candles - you are to remove 5. How many different sets of 5 candles could you remove?






38. What is the 'Solution' for a system of linear equations?






39. 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?






40. Can the output value of a function have more than one input value?






41. What is the absolute value function?






42. What is the side length of an equilateral triangle with altitude 6?






43. What is a central angle?






44. Reduce: 4.8 : 0.8 : 1.6






45. Order of quadrants:






46. Simplify the expression (p^2 - q^2)/ -5(q - p)






47. Factor x^2 - xy + x.






48. What is the formula for computing simple interest?






49. A number is divisible by 6 if...






50. A number is divisible by 4 is...