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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. 60 < all primes <70






2. 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?






3. 413.03 x 10^(-4) =






4. What is a tangent?






5. The ratio of the areas of two similar polygons is ...






6. a^2 + 2ab + b^2






7. a^2 - b^2 =






8. 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?






9. x^6 / x^3






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






11. 25^(1/2) or sqrt. 25 =






12. A number is divisible by 6 if...






13. Define a 'monomial'






14. What is the name for a grouping of the members within a set based on a shared characteristic?






15. What is an isoceles triangle?






16. 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)






17. The perimeter of a square is 48 inches. The length of its diagonal is:






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






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






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






21. What are the rational numbers?






22. Factor x^2 - xy + x.






23. sqrt 2(sqrt 6)=






24. 2sqrt4 + sqrt4 =






25. (6sqrt3) x (2sqrt5) =






26. How many multiples does a given number have?






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






28. 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?






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






30. Legs 6 - 8. Hypotenuse?






31. In a triangle inscribed inside a circle - where the diameter is one side of the triangle - which angle is largest?






32. What is a piecewise equation?






33. When does a function automatically have a restricted domain (2)?






34. 50 < all primes< 60






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






36. A company places a 6-symbol code on each product. The code consists of the letter T - followed by 3 numerical digits - and then 2 consonants (Y is a conson). How many codes are possible?






37. What transformation occurs if point C is reflected over the x-axis and then the y-axis?






38. What is a parabola?






39. 1:sqrt3:2 is the ratio of the sides of what kind of triangle?






40. What percent of 40 is 22?






41. What are the real numbers?






42. What is the set of elements found in both A and B?






43. Formula to find a circle'S circumference from its diameter?






44. What is the percent formula?






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






46. 10<all primes<20






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






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






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






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