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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. 20<all primes<30






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






3. What is the slope of a horizontal line?






4. 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?






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






6. Can you simplify sqrt72?






7. (-1)^3 =






8. How many multiples does a given number have?






9. 5/6 in percent?






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






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






12. If the 80th percentile of the measurements is 72degrees - about how many measurments are between 69 degrees and 72 degrees? Round your answer to the nearest tenth






13. sqrt 2(sqrt 6)=






14. What is an arc of a circle?






15. Legs 6 - 8. Hypotenuse?






16. Is 0 even or odd?






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






18. In similar hexagons - the ratio of the areas is 16:25. What is the ratio of their corresponding sides?






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






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






21. What does the graph x^2 + y^2 = 64 look like?






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






23. 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?






24. 70 < all primes< 80






25. (x^2)^4






26. 1/6 in percent?






27. A number is divisible by 9 if...






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






29. What is a subset?






30. What is the maximum value for the function g(x) = (-2x^2) -1?






31. Formula for the area of a circle?






32. A triangle is inscribed in a semi circle with legs 5 and 12. What is the circumfermence of the semicircle?






33. 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?






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






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






36. Convert 0.7% to a fraction.






37. Can you subtract 3sqrt4 from sqrt4?






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






39. 413.03 x 10^(-4) =






40. In a regular polygon with n sides - the formula for the sum of interior angles






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






42. What is a chord of a circle?






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






44. (6sqrt3) x (2sqrt5) =






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






46. What is the graph of f(x) shifted right c units or spaces?






47. What are 'Supplementary angles?'






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






49. Which quadrant is the upper right hand?






50. What are the roots of the quadrinomial x^2 + 2x + 1?







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