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GMAT Math Memorization

Subjects : gmat, math

Instructions:

Answer 50 questions in 30 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. SQRT 1 -000 -000
1 -000
165
221
78

2. SQRT 81
125
9
Difference in the y-coordinates over the difference in the x coodinates
81

3. 30:60:90 Right Triangle (Lenghts)
60
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
x:x^(1/3):2x
Amount of increase/original amount = x/100 (Then cross multiply to find x)

4. SQRT 49
Odd
7
27
20

5. SQRT 2 -401
10
49
64
100

6. =8*15
120
27
13
If it is divisible by both 2 and 3 (318 is because it is even and the sum of 3+1+8 is divisible by 3)

7. Area of a circle?
42
72
Pr^2
1 -000

8. =15*17
A+B (Add both probabilities)
255
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
120

9. =7*9
168
1 -000
63
y=mx+b where b is the y-intercept (the point which crosses the y-axis) m is the slope of the line - and x & y are the coordinates of some point on that line

10. Order of operations
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)
247
7
208

11. =4^1
108
4
99
96

12. =3^5
60
8
243
7

13. =5*10
125
400
36
50

14. =3*17
360
252
10 -000
51

15. =13*19
81
247
152
36

16. even + odd =
Combinations don't care about the order of the problems
Pick the # that occurs most frequently
Odd
125

17. =9^4
342
165
6 -561
Pick the # that occurs most frequently

18. =4*10
40
216
132
114

19. =4*17
40
4 -096
68
133

20. =6*6
187
120
36
132

21. =9*11
400
99
64
144

22. =6^3
18
216
44
154

23. =7*11
220
77
6
90

24. Dividing Decimals
85
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
3
12

25. =9*20
7
36
180
Won't = 1 - Will

26. =6*20
120
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
112
Undefined

27. If you raise a negative number to an even power - what happens to the number?
7
It becomes positive
120
81

28. =9*13
180
117
27
105

29. multiplying decimals
5
171
Ignor decimal points and multiply the two numbers - then count the digits to the right of the decimal points in the original numbers and place the decimal so there are the same number of digits to the right of the decimal
80

30. Key to percent increase/decrease
Rate * Time = Distance (Hint: Draw a chart)
168
60
Amount of increase/original amount = x/100 (Then cross multiply to find x)

31. =5*20
108
2 -401
100
342

32. =3^2
Ignor decimal points and multiply the two numbers - then count the digits to the right of the decimal points in the original numbers and place the decimal so there are the same number of digits to the right of the decimal
126
126
9

33. how do you find the range of a set of numbers?
80
63
Subtract the smallest number from the greatest number
128

34. =5*11
36
56
9
55

35. =2^6
64
16
68
6 -561

36. =6^5
One (1)
119
6 -561
7 -776

37. =10^2
70
100
144
6 -561

38. odd + odd =
4
289
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
Even

39. =8*8
81
280
320
64

40. =3*4
196
12
51
60

41. =10^1
10
5^(1/3)
A*B (Multiply both probabilities)
3

42. SQRT 4
2
9
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller
18

43. Multiplying Fractions
4 -096
72
Multiply the numerators and put the product over the product of the denominators
260

44. SQRT 625
72
1.414213562
32
25

45. =8*9
3
72
266
25

46. =12*13
15
10 -000
156
7 -776

47. When is a number divisible by 4?

48. =8*14
112
121
16
171

49. SQRT 2
81
1.414213562
80
210

50. =9^3
128
729
400
2