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GMAT Math Memorization

Subjects : gmat, 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. =5*9
81
20
1 -024
45

2. =8^1
70
90
32
8

3. 125^(1/3)
50
5
90
Pr^2

4. =3*13
39
45
55
15

5. =13*16
208
Combinations don't care about the order of the problems
4
80

6. =2^10
1 -024
9
Multiply the # of choices for each of the spots
255

7. =8^2
64
512
78
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

8. =6*17
Even
7
102
272

9. =3*14
Odd
42
2
10

10. =7*13
1
729
91
209

11. =9*18
625
162
266
5

12. When is a number divisible by 3?
343
49
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
272

13. =9*9
81
266
132
625

14. =15*20
288
300
99
x:x^(1/3):2x

15. =3*15
1 -000
45
56
91

16. =8*13
2pr
104
125
221

17. =3^3
27
121
729
343

18. Key to percent increase/decrease
Multiply the # of choices for each of the spots
300
Amount of increase/original amount = x/100 (Then cross multiply to find x)
Subtract the smallest number from the greatest number

19. =5*13
Permutations ask for 'arraingements' Combinations ask for 'Groups'
100
10
65

20. =5*5
Add or subtract the numbers on top and keep the same denominator
25
15
48

21. =10^7
64
729
30
10 -000 -000

22. SQRT 36
1 -296
10 -000 -000
42
6

23. =4*6
24
(b*h)/2
20
160

24. =8^3
512
105
0 (any fraction with 0 on top is 0)
125

25. =13*13
260
169
180
36

26. =3^6
Pr^2
54
44
729

27. When is a number divisible by 6?
30
216
Invert (reciprocal) the second fraction and multiply
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)

28. =5^4
121
160
625
Multiply the numerators and put the product over the product of the denominators

29. =6^3
216
72
66
Odd

30. Odds that at least one thing will happen?

31. =3*10
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)
Difference in the y-coordinates over the difference in the x coodinates
72
30

32. =7^3
105
NO
27
343

33. even x odd =
60
Even
80
32

34. =4^3
81
4
64
209

35. =15*15
400
225
64
7

36. Permutations: single source - order matters
Base * Height
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller
27
10 -000

37. =3^3
Add their exponents (6^2 *6^3 = 6^5)
27
42
112

38. =3*18
140
136
54
80

39. =17*20
80
36
340
102

40. Any number to the negative power (y) is equal to?
Amount of increase/original amount = x/100 (Then cross multiply to find x)
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)
10 -000 -000 -000
60

41. =10^10
204
165
121
10 -000 -000 -000

42. =8*12
168
96
46 -656
16

43. =9^5
59 -049
68
78
50

44. =6*16
Combinations don't care about the order of the problems
96
169
81

45. =9*15
45
135
255
136

46. =9*17
117
3
153
NO

47. =11*16
100
25
8
176

48. When is a number divisible by 4?

49. =3*4
40
4
1.732050808
12

50. =7*8
56
120
300
2