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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. What is the surface area of a cylinder with radius 5 and height 8?






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






3. 1:sqrt3:2 is the ratio of the sides of what kind of triangle?






4. 2sqrt4 + sqrt4 =






5. 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?






6. Whats the difference between factors and multiples?






7. How to find the area of a sector?






8. a^0 =






9. 5x^2 - 35x -55 = 0






10. 60 < all primes <70






11. 10<all primes<20






12. x^4 + x^7 =






13. How many sides does a hexagon have?






14. Legs 5 - 12. Hypotenuse?






15. What is the order of operations?






16. What are the rational numbers?






17. What are the roots of the quadrinomial x^2 + 2x + 1?






18. A number is divisible by 4 is...






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






20. 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?






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






22. What is the name of set with a number of elements which cannot be counted?






23. Reduce: 4.8 : 0.8 : 1.6






24. How to determine percent decrease?






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






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






27. What is the slope of a horizontal line?






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






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






30. x^6 / x^3






31. What is a tangent?






32. 1/8 in percent?






33. (-1)^2 =






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






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






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






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






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






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






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






41. Which quandrant is the lower right hand?






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. What is a chord of a circle?






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. Surface area for a cylinder?






46. 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?






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






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






49. a^2 + 2ab + b^2






50. 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?