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






2. a^2 - b^2






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






4. How many sides does a hexagon have?






5. Legs: 3 - 4. Hypotenuse?






6. What is the 'Restricted domain of a function'?






7. Formula for the area of a circle?






8. What is a subset?






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






10. (-1)^2 =






11. What are the irrational numbers?

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






13. Factor x^2 - xy + x.






14. What is a central angle?






15. 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?






16. Which quandrant is the lower right hand?






17. 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?






18. 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)?






19. What are the smallest three prime numbers greater than 65?






20. 40 < all primes<50






21. a^2 + 2ab + b^2






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






23. 4.809 X 10^7 =






24. 0^0






25. A number is divisible by 4 is...






26. 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.






27. Define a 'monomial'






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






29. Number of degrees in a triangle






30. 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?






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






32. Order of quadrants:






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






34. How to determine percent decrease?






35. 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?






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






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






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






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






40. Circumference of a circle?






41. What is the side length of an equilateral triangle with altitude 6?






42. If 10800 is invested at a simple interest rate of 4% - what is the value of the investment after 18 months?






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






44. 10^6 has how many zeroes?






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






46. Formula to calculate arc length?






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






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






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






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