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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. 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?






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






3. a^2 - b^2 =






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






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






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






7. What is the formula for computing simple interest?






8. What is a parabola?






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






10. What is a set with no members called?






11. Find the surface area of a cylinder with radius 3 and height 12.






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






13. When the 'a' in the parabola is negative...






14. 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)






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






16. Can you subtract 3sqrt4 from sqrt4?






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






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






19. In a triangle inscribed inside a circle - where the diameter is one side of the triangle - which angle is largest?






20. 5/8 in percent?






21. Circumference of a circle?






22. What is the slope of a horizontal line?






23. What are the rational numbers?






24. x^4 + x^7 =






25. What is a major arc?


26. (-1)^2 =






27. What is the order of operations?






28. Formula for the area of a circle?






29. 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?






30. What is the percent formula?






31. What are the irrational numbers?


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






33. What are congruent triangles?






34. If a=-1 and b=3 - what is the value of (4(a^3)(b^2) - 12(a^2)(b^5)) / (16(a^3)(b^2))?






35. 25^(1/2) or sqrt. 25 =






36. (-1)^3 =






37. A cylinder has surface area 22pi. If the cylinder has a height of 10 - what is its radius?






38. The slope of a line perpendicular to (a/b)?






39. 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)]?






40. 30< all primes<40






41. What transformation occurs if point C is reflected over the x-axis and then the y-axis?






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






43. 10<all primes<20






44. a^2 + 2ab + b^2






45. Legs 6 - 8. Hypotenuse?






46. 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.






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






48. 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?






49. When the 'a' in a parabola is positive....






50. What is an isoceles triangle?