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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. x^4 + x^7 =






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






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






4. 5/8 in percent?






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






6. 1/6 in percent?






7. 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?






8. What is the absolute value function?






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






10. What is a subset?






11. 30< all primes<40






12. What are the real numbers?






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






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






15. What is the 'Solution' for a system of linear equations?






16. a^0 =






17. 5x^2 - 35x -55 = 0






18. What percent of 40 is 22?






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






20. Ratio of ages of Anna and Emma is 3:5 and of Emma and Nicolas is 3:5. What is the ratio of Anna to Nicholas' ages?






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






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






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






24. 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?






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






26. What is the 'Solution' for a set of inequalities.






27. Define an 'expression'.






28. Reduce: 4.8 : 0.8 : 1.6






29. 1/8 in percent?






30. Evaluate 4/11 + 11/12






31. Can you add sqrt 3 and sqrt 5?






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






33. 40 < all primes<50






34. 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)






35. Legs 6 - 8. Hypotenuse?






36. What is the 'Range' of a series of numbers?






37. a^2 - b^2 =






38. How to determine percent decrease?






39. What is a central angle?






40. Whats the difference between factors and multiples?






41. What is the coefficient of the x^2 term in the product of (x + 1)(x + 2)(x -1)?






42. 413.03 x 10^(-4) =






43. Which quandrant is the lower right hand?






44. Surface area for a cylinder?






45. Convert 0.7% to a fraction.






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






47. Which quadrant is the upper left hand?






48. What is the slope of a vertical line?

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49. Evaluate (4^3)^2






50. What is an arc of a circle?