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






2. What is an isoceles triangle?






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






4. What is the intersection of A and B?






5. 10<all primes<20






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






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






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






9. a^2 - b^2






10. Which quadrant is the upper right hand?






11. 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






12. Can you subtract 3sqrt4 from sqrt4?






13. a^2 + 2ab + b^2






14. 6w^2 - w - 15 = 0






15. What is the 'Solution' for a system of linear equations?






16. What is the coefficient of the x^2 term in the product of (x + 1)(x + 2)(x -1)?






17. Legs 6 - 8. Hypotenuse?






18. 5 bakeries sell an average of 300 muffins per bakery per day. If 2 stop making muffins but the total muffins sold stays the same - what is the average of muffins per bakery sold among the remaining?






19. sqrt 2(sqrt 6)=






20. 1/8 in percent?






21. A brick with dimensions 10. 15 and 25 weighs 1.5 kg. A second brick (same density) has dimensions 12 - 18 - and 30. What is the weight of the second brick?






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






23. The objects in a set are called two names:






24. What is the formula for compounded interest?






25. Area of a triangle?






26. 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)?






27. To multiply a number by 10^x






28. 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?






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






30. What are complementary angles?






31. 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?






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






33. 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?






34. 50 < all primes< 60






35. A company places a 6-symbol code on each product. The code consists of the letter T - followed by 3 numerical digits - and then 2 consonants (Y is a conson). How many codes are possible?






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






37. 200 <_ x <_ 300. How many values of x are divisible by 5 & 8?






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






39. 0^0






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






41. Number of degrees in a triangle






42. A number is divisible by 4 is...






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






44. What transformation occurs if point C is reflected over the x-axis and then the y-axis?






45. What are congruent triangles?






46. 8.84 / 5.2






47. What number between 70 & 75 - inclusive - has the greatest number of factors?






48. Order of quadrants:






49. What is the order of operations?






50. To convert a percent to a fraction....







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