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






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






3. Define an 'expression'.






4. Legs 6 - 8. Hypotenuse?






5. 10^6 has how many zeroes?






6. 60 < all primes <70






7. What is a subset?






8. Which quadrant is the lower left hand?






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






10. 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)?






11. P and r are factors of 100. What is greater - pr or 100?






12. How to determine percent increase?






13. 20<all primes<30






14. Can you simplify sqrt72?






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






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






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






18. Simplify 4sqrt21 X 5sqrt2 / 10sqrt7






19. 70 < all primes< 80






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






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






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






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






24. 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)






25. 413.03 x 10^(-4) =






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






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






28. Write 10 -843 X 10^7 in scientific notation






29. In a regular polygon with n sides - the formula for the sum of interior angles






30. 1:1:sqrt2 is the ratio of the sides of what kind of triangle?






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






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






33. 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?






34. 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?






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






36. Employee X is paid 19.50 per hour no matter how many a week. Employee Y earns 18 for the first 40 and 1.5 the hourly wage for every hour after that. If both earned the same amount and worked the same in one week - how many did each work?






37. 0^0






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






39. What is it called when a point is reflected to the quadrant opposite it (i.e. I to III or II to IV)?






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






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






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






43. x^(-y)=






44. 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?






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






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






48. What is the slope of a horizontal line?






49. If the two sides of a triangle are unequal then the longer side...






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