Test your basic knowledge |

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






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






3. 10^6 has how many zeroes?






4. Circumference of a circle?






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






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






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






8. Which is greater? 200x^295 or 10x^294?






9. How many sides does a hexagon have?






10. How to find the circumference of a circle which circumscribes a square?






11. The number of degrees in the largest angle of a triangle inscribed in a circle - in which the diameter of the circle is one side of the triangle.






12. 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?






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






14. 20<all primes<30






15. (x^2)^4






16. a^2 - 2ab + b^2






17. 50 < all primes< 60






18. Can you simplify sqrt72?






19. How to determine percent decrease?






20. 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)?






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






22. 3/8 in percent?






23. a^2 - b^2






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






25. Evaluate (4^3)^2






26. a^2 - b^2 =






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






28. What is a chord of a circle?






29. Formula to calculate arc length?






30. There are 10 finalists for the school spelling bee. A first - second - and third place trophy will be awarded. How many different people can get the three prizes?






31. Legs: 3 - 4. Hypotenuse?






32. To convert a decimal to a percent...






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






34. What are complementary angles?






35. 200 <_ x <_ 300. How many values of x are divisible by 5 & 8?






36. x^6 / x^3






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






38. 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?






39. 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)






40. 60 < all primes <70






41. Legs 6 - 8. Hypotenuse?






42. What percent of 40 is 22?






43. What is the slope of a horizontal line?






44. What is a subset?






45. 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?






46. What is an exterior angle?






47. What is the 'domain' of a function?






48. If 4500 is invested at a simple interest rate of 6% - what is the value of the investment after 10 months?






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






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