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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. 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)






2. How to determine percent increase?






3. 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?






4. Surface area for a cylinder?






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






6. Factor x^2 - xy + x.






7. If the two sides of a triangle are unequal then the longer side...






8. 3/8 in percent?






9. (x^2)^4






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






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






12. 2sqrt4 + sqrt4 =






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






14. x^4 + x^7 =






15. What is a finite set?






16. What are congruent triangles?






17. Formula to calculate arc length?






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






19. Convert 0.7% to a fraction.






20. 0^0






21. Formula to find a circle'S circumference from its radius?






22. 10^6 has how many zeroes?






23. Write 10 -843 X 10^7 in scientific notation






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






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






26. Is 0 even or odd?






27. Legs 6 - 8. Hypotenuse?






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






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






30. 70 < all primes< 80






31. What is the intersection of A and B?






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






33. x^(-y)=






34. Simplify 9^(1/2) X 4^3 X 2^(-6)?






35. 200 <_ x <_ 300. How many values of x are divisible by 5 & 8?






36. 413.03 x 10^(-4) =






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






38. a^2 - b^2






39. What are the real numbers?






40. What are the integers?






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






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






43. What is the 'union' of A and B?






44. What is a parabola?






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






46. How many multiples does a given number have?






47. For what values should the domain be restricted for the function f(x) = sqrt(x + 8)






48. 5/6 in percent?






49. 1/8 in percent?






50. 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?