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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. Pi is a ratio of what to what?

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2. If 8 schools are in a conference - how many games are played if each team plays each other exactly once?






3. 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)






4. To convert a percent to a fraction....






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






6. What is the ratio of the sides of an isosceles right triangle?






7. 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))?






8. 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?






9. What is a subset?






10. Formula for the area of a sector of a circle?






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






12. What is a tangent?






13. Evaluate 4/11 + 11/12






14. Which is greater? 64^5 or 16^8






15. Define a 'monomial'






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






17. What does scientific notation mean?






18. 5x^2 - 35x -55 = 0






19. 60 < all primes <70






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






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






22. sqrt 2(sqrt 6)=






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






24. Evaluate (4^3)^2






25. How many multiples does a given number have?






26. What is the percent formula?






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






28. How many sides does a hexagon have?






29. 6w^2 - w - 15 = 0






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






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






32. What is the formula for computing simple interest?






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






34. Which quadrant is the upper left hand?






35. What is the empty set?






36. 50 < all primes< 60






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






38. 4.809 X 10^7 =






39. What is an isoceles triangle?






40. How to find the diagonal of a rectangular solid?






41. What number between 70 & 75 - inclusive - has the greatest number of factors?






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






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






44. Which quadrant is the lower left hand?






45. Which quandrant is the lower right hand?






46. What is the 'Solution' for a set of inequalities.






47. 20<all primes<30






48. 10<all primes<20






49. What are congruent triangles?






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