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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. x^(-y)=






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






3. (-1)^3 =






4. 1/8 in percent?






5. 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?






6. Formula for the area of a sector of a circle?






7. Simplify 9^(1/2) X 4^3 X 2^(-6)?






8. For what values should the domain be restricted for the function f(x) = sqrt(x + 8)






9. What is a subset?






10. 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?






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






12. What is a piecewise equation?






13. Whats the difference between factors and multiples?






14. To convert a decimal to a percent...






15. Define a 'monomial'






16. If a=-1 and b=3 - what is the value of (4(a^3)(b^2) - 12(a^2)(b^5)) / (16(a^3)(b^2))?






17. What is the percent formula?






18. 40 < all primes<50






19. What is the slope of a horizontal line?






20. Legs: 3 - 4. Hypotenuse?






21. 1/6 in percent?






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






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






24. If an inequality is multiplied or divided by a negative number....






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






26. Length of an arc of a circle?






27. 6w^2 - w - 15 = 0






28. What is the empty set?






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






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






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






32. Can you simplify sqrt72?






33. 60 < all primes <70






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






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






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






37. What is the slope of a vertical line?


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






39. What is a chord of a circle?






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






41. What is a finite set?






42. 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?






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






44. 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?






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






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






47. To multiply a number by 10^x






48. a^2 - b^2






49. Can you add sqrt 3 and sqrt 5?






50. 1:1:sqrt2 is the ratio of the sides of what kind of triangle?