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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. To multiply a number by 10^x






2. What are congruent triangles?






3. Order of quadrants:






4. If Madagascar'S exports totaled 1.3 billion in 2009 - and 4% came from China - what was the value in millions of the country'S exports to China?






5. Formula for the area of a circle?






6. 1:sqrt3:2 is the ratio of the sides of what kind of triangle?






7. (x^2)^4






8. The perimeter of a square is 48 inches. The length of its diagonal is:






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






10. When does a function automatically have a restricted domain (2)?






11. What is the slope of a horizontal line?






12. a^2 - b^2 =






13. Convert 0.7% to a fraction.






14. Legs: 3 - 4. Hypotenuse?






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






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






17. A triangle is inscribed in a semi circle with legs 5 and 12. What is the circumfermence of the semicircle?






18. 10^6 has how many zeroes?






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






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






21. 40 < all primes<50






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






23. What is an isoceles triangle?






24. 1/6 in percent?






25. How many sides does a hexagon have?






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






27. Legs 5 - 12. Hypotenuse?






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






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






30. What is a set with no members called?






31. Suppose that the graph of f(x) is the result of stretching y=x + 5 away from the x-axis by a factor of 2. What is the new equation for the graph f(x)?






32. Can you simplify sqrt72?






33. 4.809 X 10^7 =






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






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






36. x^2 = 9. What is the value of x?






37. 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)]?






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






39. Which quadrant is the upper left hand?






40. Which quandrant is the lower right hand?






41. What is a piecewise equation?






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






43. 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?






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






45. 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






46. What are the real numbers?






47. What is the ratio of the sides of an isosceles right triangle?






48. (12sqrt15) / (2sqrt5) =






49. A number is divisible by 3 if ...






50. 70 < all primes< 80