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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. Which quadrant is the lower left hand?






3. What are congruent triangles?






4. P and r are factors of 100. What is greater - pr or 100?






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






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






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






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






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






10. What is a parabola?






11. A number is divisible by 4 is...






12. What is a central angle?






13. 4.809 X 10^7 =






14. The larger the absolute value of the slope...






15. 70 < all primes< 80






16. 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?






17. How many sides does a hexagon have?






18. What are complementary angles?






19. What percent of 40 is 22?






20. 1:1:sqrt2 is the ratio of the sides of what kind of triangle?






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






22. (x^2)^4






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






24. 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?






25. Can you simplify sqrt72?






26. 1/2 divided by 3/7 is the same as






27. 40 < all primes<50






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






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






30. What is it called when a point is reflected to the quadrant opposite it (i.e. I to III or II to IV)?






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






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






33. Legs 5 - 12. Hypotenuse?






34. How to find the circumference of a circle which circumscribes a square?






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






36. x^(-y)=






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






38. What is a minor arc?






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






40. To multiply a number by 10^x






41. What is a chord of a circle?






42. 60 < all primes <70






43. What is the slope of a vertical line?






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






45. Can you add sqrt 3 and sqrt 5?






46. What is the 'domain' of a function?






47. Can you subtract 3sqrt4 from sqrt4?






48. What is the formula for computing simple interest?






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






50. Define an 'expression'.