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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)^3 =






2. How to determine percent increase?






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






4. x^6 / x^3






5. What is the absolute value function?






6. Suppose that the graph of f(x) is the result of stretching y=x + 5 away from the x-axis by a factor of 2. What is the new equation for the graph f(x)?






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






8. What is the 'Range' of a series of numbers?






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






10. 10<all primes<20






11. What is the formula for computing simple interest?






12. Which is greater? 27^(-4) or 9^(-8)






13. 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?






14. 1/8 in percent?






15. Legs 6 - 8. Hypotenuse?






16. What are the irrational numbers?

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






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






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






20. Formula for the area of a circle?






21. What are complementary angles?






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






23. 5 bakeries sell an average of 300 muffins per bakery per day. If 2 stop making muffins but the total muffins sold stays the same - what is the average of muffins per bakery sold among the remaining?






24. Volume for a cylinder?






25. (12sqrt15) / (2sqrt5) =






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






27. What is the set of elements which can be found in either A or B?






28. Convert 0.7% to a fraction.






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






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






31. 1/6 in percent?






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






33. 40 < all primes<50






34. Define an 'expression'.






35. Describe the relationship between 3x^2 and 3(x - 1)^2






36. What are the real numbers?






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






38. What is the formula for compounded interest?






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






40. Suppose that the graph of f(x) is the result of sliding the graph of y=2x^2 down 3 units of spaces. What is the new equation?






41. 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?






42. Simplify 4sqrt21 X 5sqrt2 / 10sqrt7






43. 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?






44. Evaluate (4^3)^2






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






46. Can you add sqrt 3 and sqrt 5?






47. What are the integers?






48. 1:1:sqrt2 is the ratio of the sides of what kind of triangle?






49. a^2 - b^2 =






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