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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. 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)?






2. Formula of rectangle where l increases by 20% and w decreases by 20%






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






4. 1/2 divided by 3/7 is the same as






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






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






7. Which quadrant is the upper right hand?






8. What is the slope of a horizontal line?






9. Length of an arc of a circle?






10. 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






11. What are the integers?






12. 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?






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






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






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






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






17. 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?






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






19. How many multiples does a given number have?






20. Number of degrees in a triangle






21. In a triangle where the two legs are 4 and 3 - what is the value of a line directly intersecting the middle coming from the meeting point of the two legs?






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






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






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






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






26. 1/6 in percent?






27. 1:sqrt3:2 is the ratio of the sides of what kind of triangle?






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






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






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






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






32. 10<all primes<20






33. 20<all primes<30






34. How to determine percent decrease?






35. What is the 'Restricted domain of a function'?






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






37. What is the order of operations?






38. Legs 5 - 12. Hypotenuse?






39. 0^0






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






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






42. Is 0 even or odd?






43. Which quadrant is the upper left hand?






44. 6w^2 - w - 15 = 0






45. What is the sum of the angles of a triangle?






46. What is the formula for compounded interest?






47. To multiply a number by 10^x






48. To convert a percent to a fraction....






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






50. Pi is a ratio of what to what?

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