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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. Is 0 even or odd?






2. 1/6 in percent?






3. What does the graph (x+2)^2 + (y+2)^2 = 9 look like?






4. What is the order of operations?






5. Define an 'expression'.






6. What is a parabola?






7. How to determine percent decrease?






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






9. What is the slope of a horizontal line?






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






11. 413.03 x 10^(-4) =






12. 10<all primes<20






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






14. 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?






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






16. 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?






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






18. 10^6 has how many zeroes?






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






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






21. 4.809 X 10^7 =






22. What is the slope of a vertical line?

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






24. 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?






25. What are complementary angles?






26. What is a piecewise equation?






27. x^(-y)=






28. 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)






29. What are the irrational numbers?

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30. What are the real numbers?






31. (6sqrt3) x (2sqrt5) =






32. What is a finite set?






33. 2sqrt4 + sqrt4 =






34. 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?






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






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






37. 200 <_ x <_ 300. How many values of x are divisible by 5 & 8?






38. Formula for the area of a circle?






39. 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?






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






41. What is an isoceles triangle?






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






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






44. Evaluate (4^3)^2






45. What is an arc of a circle?






46. a^0 =






47. Surface area for a cylinder?






48. Number of degrees in a triangle






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






50. 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)]?