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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^-1)/a^5






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






3. 1/8 in percent?






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






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






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






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






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






9. 5x^2 - 35x -55 = 0






10. Can you add sqrt 3 and sqrt 5?






11. For similar triangles - the ratio of their corresponding sides is 2:3. What is the ratio of their areas?






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






13. How many digits are there between the decimal point and the first even digit in the decimal equivalent of 1/[(2^8)(5^3)]






14. Length of an arc of a circle?






15. What is a central angle?






16. What is the side length of an equilateral triangle with altitude 6?






17. What is the 'Range' of a function?






18. What is the set of elements found in both A and B?






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






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






21. How to determine percent decrease?






22. 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?






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






24. T or F? Given d -e &f =/ 0 - [(d^3)e(f^5)] / 2d(e^3) / [3(d^2)(e^3)(f^7)] / [6(e^5)(f^2)]?






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






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






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






28. 7/8 in percent?






29. What are complementary angles?






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






31. Evaluate (4^3)^2






32. What are the smallest three prime numbers greater than 65?






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






34. How many 3-digit positive integers are even and do not contain the digit 4?






35. Legs 5 - 12. Hypotenuse?






36. 1/2 divided by 3/7 is the same as






37. What is the area of a regular hexagon with side 6?






38. What is the empty set?






39. How many multiples does a given number have?






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






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






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






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






44. 50 < all primes< 60






45. Simplify (a^2 + b)^2 - (a^2 - b)^2






46. There are 10 finalists for the school spelling bee. A first - second - and third place trophy will be awarded. How many different people can get the three prizes?






47. 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?






48. (-1)^3 =






49. Pi is a ratio of what to what?

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