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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. In a triangle inscribed inside a circle - where the diameter is one side of the triangle - which angle is largest?






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






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






4. 10^6 has how many zeroes?






5. Formula of rectangle where l increases by 20% and w decreases by 20%






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






7. Which quandrant is the lower right hand?






8. 3/8 in percent?






9. Whats the difference between factors and multiples?






10. What percent of 40 is 22?






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






12. What are complementary angles?






13. In a triangle where the two legs are 4 and 3 - what is the value of a line directly intersecting the middle coming from the meeting point of the two legs?






14. Legs 6 - 8. Hypotenuse?






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






16. (a^-1)/a^5






17. A number is divisible by 4 is...






18. Suppose that the graph of f(x) is the result of sliding the graph of y=2x^2 down 3 units of spaces. What is the new equation?






19. What are the integers?






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






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






22. What number between 70 & 75 - inclusive - has the greatest number of factors?






23. Define an 'expression'.






24. 60 < all primes <70






25. 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?






26. Can you subtract 3sqrt4 from sqrt4?






27. Evaluate (4^3)^2






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






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






30. 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?






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






32. 200 <_ x <_ 300. How many values of x are divisible by 5 & 8?






33. 7/8 in percent?






34. a^2 + 2ab + b^2






35. x^(-y)=






36. What is the slope of a vertical line?

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






38. What is the sum of the angles of a triangle?






39. 20<all primes<30






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






41. a^2 - b^2






42. 40 < all primes<50






43. 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)?






44. 1:1:sqrt2 is the ratio of the sides of what kind of triangle?






45. What are congruent triangles?






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






47. What is the order of operations?






48. x^4 + x^7 =






49. What is a tangent?






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