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






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






3. How to find the area of a sector?






4. What are complementary angles?






5. The four angles around a point measure y - 2y - 35 and 55 respectively. What is the value of y?






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






7. Whats the difference between factors and multiples?






8. 1:1:sqrt2 is the ratio of the sides of what kind of triangle?






9. 10^6 has how many zeroes?






10. 1:sqrt3:2 is the ratio of the sides of what kind of triangle?






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






12. Define a 'monomial'






13. 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






14. 1/8 in percent?






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






16. Volume for a cylinder?






17. Formula to calculate arc length?






18. 25^(1/2) or sqrt. 25 =






19. What are the rational numbers?






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






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






22. What is the 'Range' of a function?






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






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






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






26. 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?






27. Surface area for a cylinder?






28. What is a set with no members called?






29. 6w^2 - w - 15 = 0






30. 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?






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






32. What does scientific notation mean?






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






34. To convert a decimal to a percent...






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






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






37. A number is divisible by 4 is...






38. Which quandrant is the lower right hand?






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






40. Ratio of ages of Anna and Emma is 3:5 and of Emma and Nicolas is 3:5. What is the ratio of Anna to Nicholas' ages?






41. x^6 / x^3






42. 5/6 in percent?






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






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






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






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






47. 1/6 in percent?






48. 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?






49. (-1)^2 =






50. What is the formula for computing simple interest?