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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. What is a set with no members called?






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






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






4. What is the percent formula?






5. Which quandrant is the lower right hand?






6. What is an isoceles triangle?






7. 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)






8. What is the slope of a vertical line?

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






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






11. Simplify the expression (p^2 - q^2)/ -5(q - p)






12. Evaluate 4/11 + 11/12






13. (6sqrt3) x (2sqrt5) =






14. Define a 'monomial'






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






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






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






18. 5/8 in percent?






19. Can the input value of a function have more than one output value (i.e. x: y - y1)?






20. Hector invested $6000. Part was invested in account with 9% simple annual interest - and the rest in account with 7% simple annual interest. If he earned $490 in the first year of these investments - how much did he invest in each account?






21. What does scientific notation mean?






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






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






24. What is the 'Range' of a series of numbers?






25. What are complementary angles?






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






27. 60 < all primes <70






28. a^2 - b^2






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






30. What are the real numbers?






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






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






33. 25^(1/2) or sqrt. 25 =






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






35. 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?






36. What is a subset?






37. If you have a set of n objects - but you only want to order k of them - what formula do you use to determine the number of permutations?






38. (-1)^3 =






39. Which quadrant is the lower left hand?






40. a^2 - b^2 =






41. Suppose that the graph of f(x) is the result of stretching y=x + 5 away from the x-axis by a factor of 2. What is the new equation for the graph f(x)?






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






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






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






45. Evaluate (4^3)^2






46. 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?






47. a^0 =






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






49. 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?






50. What are the irrational numbers?

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