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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. Which is greater? 27^(-4) or 9^(-8)






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






3. 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?






4. Formula to calculate arc length?






5. 10<all primes<20






6. (x^2)^4






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






8. What is the ratio of the sides of a 30-60-90 triangle?






9. What is a parabola?






10. 1/8 in percent?






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






12. What is the empty set?






13. 1:sqrt3:2 is the ratio of the sides of what kind of triangle?






14. 10^6 has how many zeroes?






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






16. What are complementary angles?






17. sqrt 2(sqrt 6)=






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






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






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






21. 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?






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






23. Can you subtract 3sqrt4 from sqrt4?






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






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






26. Formula to find a circle'S circumference from its radius?






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






28. Formula for the area of a sector of a circle?






29. 70 < all primes< 80






30. 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))?






31. 30< all primes<40






32. 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?






33. What are the irrational numbers?

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34. 60 < all primes <70






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






36. To convert a decimal to a percent...






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






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






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






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






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






42. 5/6 in percent?






43. What is the slope of a vertical line?

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44. What is an isoceles triangle?






45. 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.






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






47. Define a 'monomial'






48. Factor a^2 + 2ab + b^2






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






50. Which quadrant is the lower left hand?