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






2. What are the real numbers?






3. A number is divisible by 4 is...






4. (-1)^2 =






5. What is an exterior angle?






6. What are the rational numbers?






7. What is the order of operations?






8. Define an 'expression'.






9. sqrt 2(sqrt 6)=






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






11. 30< all primes<40






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






13. What is a parabola?






14. Hector invested $6000. Part was invested in account with 9% simple annual interest - and the rest in account with 7% simple annual interest. If he earned $490 in the first year of these investments - how much did he invest in each account?






15. x^6 / x^3






16. (12sqrt15) / (2sqrt5) =






17. Legs 6 - 8. Hypotenuse?






18. 50 < all primes< 60






19. Evaluate 4/11 + 11/12






20. What are the irrational numbers?

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






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






23. Simplify 4sqrt21 X 5sqrt2 / 10sqrt7






24. Find the surface area of a cylinder with radius 3 and height 12.






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






26. What does the graph x^2 + y^2 = 64 look like?






27. 10<all primes<20






28. Pi is a ratio of what to what?

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29. How to determine percent decrease?






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






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






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






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






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






35. How to determine percent increase?






36. 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)






37. 5/8 in percent?






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






39. Ratio of ages of Anna and Emma is 3:5 and of Emma and Nicolas is 3:5. What is the ratio of Anna to Nicholas' ages?






40. Which quadrant is the upper right hand?






41. To convert a decimal to a percent...






42. Area of a triangle?






43. 5x^2 - 35x -55 = 0






44. Surface area for a cylinder?






45. x^4 + x^7 =






46. (-1)^3 =






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






48. a^2 - b^2 =






49. What percent of 40 is 22?






50. a^2 - 2ab + b^2