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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 formula for computing simple interest?






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






3. a^0 =






4. 10^6 has how many zeroes?






5. Which quadrant is the upper left hand?






6. 1/2 divided by 3/7 is the same as






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






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






9. 60 < all primes <70






10. 6w^2 - w - 15 = 0






11. 5x^2 - 35x -55 = 0






12. Can you add sqrt 3 and sqrt 5?






13. How to determine percent increase?






14. What is a piecewise equation?






15. What is an isoceles triangle?






16. 8.84 / 5.2






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






18. What is an arc of a circle?






19. 20<all primes<30






20. What are congruent triangles?






21. What is the measure of an exterior angle of a regular pentagon?






22. How to determine percent decrease?






23. 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?






24. Order of quadrants:






25. Number of degrees in a triangle






26. a^2 + 2ab + b^2






27. (-1)^2 =






28. What is a minor arc?

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29. 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?






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






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






32. (x^2)^4






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






34. The ratio of the areas of two similar polygons is ...






35. What is the empty set?






36. 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)?






37. If you have a set of n objects - but you only want to order k of them - what formula do you use to determine the number of permutations?






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






39. Simplify the expression [(b^2 - c^2) / (b - c)]






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






41. Whats the difference between factors and multiples?






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






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






44. What is the ratio of the surface area of a cube with an edge of 10 to the surface area of a rectangular solid with dimensions 2 - 4 - and 6?






45. What is the percent formula?






46. (6sqrt3) x (2sqrt5) =






47. a^2 - b^2






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






49. Can the output value of a function have more than one input value?






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