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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. 6w^2 - w - 15 = 0






2. Define an 'expression'.






3. 1:sqrt3:2 is the ratio of the sides of what kind of triangle?






4. What is an arc of a circle?






5. How to determine percent increase?






6. What is a parabola?






7. For similar triangles - the ratio of their corresponding sides is 2:3. What is the ratio of their areas?






8. Factor x^2 - xy + x.






9. How to determine percent decrease?






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






11. 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?






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






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






14. Factor a^2 + 2ab + b^2






15. 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?






16. What is a chord of a circle?






17. What is the 'Range' of a function?






18. What is a finite set?






19. To convert a percent to a fraction....






20. What is the name of set with a number of elements which cannot be counted?






21. Simplify (a^2 + b)^2 - (a^2 - b)^2






22. 2sqrt4 + sqrt4 =






23. 7/8 in percent?






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






25. Area of a triangle?






26. Legs: 3 - 4. Hypotenuse?






27. In a regular polygon with n sides - the formula for the sum of interior angles






28. What is the formula for compounded interest?






29. What are the members or elements of a set?






30. What is the measure of an exterior angle of a regular pentagon?






31. 5/8 in percent?






32. x^6 / x^3






33. sqrt 2(sqrt 6)=






34. If 4500 is invested at a simple interest rate of 6% - what is the value of the investment after 10 months?






35. 5/6 in percent?






36. How many 3-digit positive integers are even and do not contain the digit 4?






37. Can you subtract 3sqrt4 from sqrt4?






38. Employee X is paid 19.50 per hour no matter how many a week. Employee Y earns 18 for the first 40 and 1.5 the hourly wage for every hour after that. If both earned the same amount and worked the same in one week - how many did each work?






39. If r - t - s & u are distinct - consecutive prime numbers - less than 31 - which of the following could be an average of them (4 - 4.25 - 6 - 9 - 24 - 22 - 24)






40. The number of degrees in the largest angle of a triangle inscribed in a circle - in which the diameter of the circle is one side of the triangle.






41. (6sqrt3) x (2sqrt5) =






42. 4.809 X 10^7 =






43. P and r are factors of 100. What is greater - pr or 100?






44. Is 0 even or odd?






45. What is a subset?






46. What is the empty set?






47. Can you simplify sqrt72?






48. What is the ratio of the sides of an isosceles right triangle?






49. 25^(1/2) or sqrt. 25 =






50. If Madagascar'S exports totaled 1.3 billion in 2009 - and 4% came from China - what was the value in millions of the country'S exports to China?