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






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. What percent of 40 is 22?






4. Formula to calculate arc length?






5. A brick with dimensions 10. 15 and 25 weighs 1.5 kg. A second brick (same density) has dimensions 12 - 18 - and 30. What is the weight of the second brick?






6. If a=-1 and b=3 - what is the value of (4(a^3)(b^2) - 12(a^2)(b^5)) / (16(a^3)(b^2))?






7. To convert a decimal to a percent...






8. What is an exterior angle?






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






10. What is the slope of a vertical line?


11. A number is divisible by 9 if...






12. What is a finite set?






13. Nine coins are tossed simultaneously. In how many of the outcomes will the fourth coin tossed show heads?






14. Order of quadrants:






15. Simplify 4sqrt21 X 5sqrt2 / 10sqrt7






16. What are complementary angles?






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






18. 7/8 in percent?






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






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






21. Simplify the expression [(b^2 - c^2) / (b - c)]






22. 25^(1/2) or sqrt. 25 =






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






24. 70 < all primes< 80






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






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






27. What is an arc of a circle?






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






29. Evaluate 4/11 + 11/12






30. What is a major arc?


31. 60 < all primes <70






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






33. What is a subset?






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






35. Which is greater? 200x^295 or 10x^294?






36. Circumference of a circle?






37. What is the common monomial factor in the expression 4(c^3)d - (c^2)(d^2) + 2cd?






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






39. There are 10 finalists for the school spelling bee. A first - second - and third place trophy will be awarded. In how many ways can the judges award the 3 prizes?






40. P and r are factors of 100. What is greater - pr or 100?






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






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






43. 1/8 in percent?






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






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






46. 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.






47. 1:sqrt3:2 is the ratio of the sides of what kind of triangle?






48. (x^2)^4






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






50. In similar hexagons - the ratio of the areas is 16:25. What is the ratio of their corresponding sides?