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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. What are 'Supplementary angles?'






2. 50 < all primes< 60






3. What is the formula for compounded interest?






4. Which quadrant is the upper right hand?






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






6. What are the integers?






7. To convert a decimal to a percent...






8. There are 10 finalists for the school spelling bee. A first - second - and third place trophy will be awarded. In how many ways can the judges award the 3 prizes?






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






10. Describe the relationship between 3x^2 and 3(x - 1)^2






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






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






13. 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?






14. 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?






15. What does the graph (x+2)^2 + (y+2)^2 = 9 look like?






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






17. What are the real numbers?






18. (-1)^3 =






19. What is the percent formula?






20. 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?






21. What is the formula for computing simple interest?






22. What is the ratio of the surface area of a cube with an edge of 10 to the surface area of a rectangular solid with dimensions 2 - 4 - and 6?






23. A number is divisible by 4 is...






24. What are the rational numbers?






25. Can the input value of a function have more than one output value (i.e. x: y - y1)?






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






27. 20<all primes<30






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






29. If an inequality is multiplied or divided by a negative number....






30. 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






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






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






33. Can you simplify sqrt72?






34. 2sqrt4 + sqrt4 =






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






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






37. (x^2)^4






38. Suppose that the graph of f(x) is the result of sliding the graph of y=2x^2 down 3 units of spaces. What is the new equation?






39. a^2 + 2ab + b^2






40. Legs 5 - 12. Hypotenuse?






41. What is a set with no members called?






42. What is an isoceles triangle?






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






44. How to find the diagonal of a rectangular solid?






45. 70 < all primes< 80






46. What is a central angle?






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






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






49. Formula to calculate arc length?






50. What is the slope of a vertical line?

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