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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. Can you subtract 3sqrt4 from sqrt4?






2. What is the formula for computing simple interest?






3. The slope of a line perpendicular to (a/b)?






4. Evaluate 3& 2/7 / 1/3






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






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






7. 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)]?






8. What is the slope of a horizontal line?






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






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






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






12. What are the irrational numbers?

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13. x^(-y)=






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






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






16. 30< all primes<40






17. Legs: 3 - 4. Hypotenuse?






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






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






20. How to determine percent decrease?






21. To multiply a number by 10^x






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






23. a^0 =






24. Reduce: 4.8 : 0.8 : 1.6






25. What is a finite set?






26. What are complementary angles?






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






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






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






30. What is the surface area of a cylinder with radius 5 and height 8?






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






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






33. 8.84 / 5.2






34. Length of an arc of a circle?






35. What is a central angle?






36. Which quadrant is the upper right hand?






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






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






39. How to find the area of a sector?






40. 1:sqrt3:2 is the ratio of the sides of what kind of triangle?






41. What are 'Supplementary angles?'






42. Formula of rectangle where l increases by 20% and w decreases by 20%






43. How to determine percent increase?






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






45. What is the third quartile of the following data set: 44 - 58 - 63 - 63 - 68 - 70 - 82






46. Max and Min lengths for a side of a triangle?






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






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






49. a^2 + 2ab + b^2






50. Order of quadrants: