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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. Legs 6 - 8. Hypotenuse?






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






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






4. What is the formula for compounded interest?






5. Legs 5 - 12. Hypotenuse?






6. 10<all primes<20






7. How to find the circumference of a circle which circumscribes a square?






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






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






10. 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?






11. What is a central angle?






12. 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?






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






14. What is the coefficient of the x^2 term in the product of (x + 1)(x + 2)(x -1)?






15. 5/8 in percent?






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






17. 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)






18. 10^6 has how many zeroes?






19. Surface area for a cylinder?






20. Length of an arc of a circle?






21. 0^0






22. 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.






23. 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?






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






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






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






27. 7/8 in percent?






28. 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?






29. What is a minor arc?

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30. What is the percent formula?






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






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






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






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






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






36. Which quandrant is the lower right hand?






37. 70 < all primes< 80






38. What does scientific notation mean?






39. The larger the absolute value of the slope...






40. 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?






41. x^6 / x^3






42. Formula to calculate arc length?






43. 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?






44. What is a finite set?






45. Which quadrant is the upper right hand?






46. In a triangle where the two legs are 4 and 3 - what is the value of a line directly intersecting the middle coming from the meeting point of the two legs?






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






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






49. 200 <_ x <_ 300. How many values of x are divisible by 5 & 8?






50. How many sides does a hexagon have?