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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. a^2 + 2ab + b^2






2. What is the intersection of A and B?






3. 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)






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






5. 30< all primes<40






6. Which quandrant is the lower right hand?






7. a^2 - 2ab + b^2






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






9. Can the output value of a function have more than one input value?






10. What is a central angle?






11. 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.






12. Order of quadrants:






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






14. 1/8 in percent?






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






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






17. What is an arc of a circle?






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






19. What is the formula for compounded interest?






20. 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?






21. 7/8 in percent?






22. 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






23. What is the absolute value function?






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






25. Max and Min lengths for a side of a triangle?






26. 5/6 in percent?






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






28. Circumference of a circle?






29. 1:sqrt3:2 is the ratio of the sides of what kind of triangle?






30. 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?






31. 70 < all primes< 80






32. To multiply a number by 10^x






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






34. 200 <_ x <_ 300. How many values of x are divisible by 5 & 8?






35. What is a chord of a circle?






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






37. How to determine percent increase?






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






39. What is the name of set with a number of elements which cannot be counted?






40. a^2 - b^2






41. What are the rational numbers?






42. 413.03 x 10^(-4) =






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






44. What is a parabola?






45. Hector invested $6000. Part was invested in account with 9% simple annual interest - and the rest in account with 7% simple annual interest. If he earned $490 in the first year of these investments - how much did he invest in each account?






46. x^4 + x^7 =






47. What is the percent formula?






48. What is a minor arc?

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






50. What is the slope of a horizontal line?