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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. =5^3
8
40
125
A*B (Multiply both probabilities)

2. =12*18
0 (any fraction with 0 on top is 0)
216
2
48

3. =10^7
10 -000 -000
3
Permutations ask for 'arraingements' Combinations ask for 'Groups'
60

4. Adding or subtracting fractions with different denominators
Multiply both fractions to get a common denominator add or subtract as usual
84
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)
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

5. =17*19
323
512
400
152

6. =3*8
24
60
77
3 -125

7. SQRT 4 -096
154
120
64
100 -000

8. =8*13
27
104
306
1 -000 -000

9. =8^2
64
5
32
1.414213562

10. Exponents - Multiplying numbers with same base
75
Add their exponents (6^2 *6^3 = 6^5)
380
27

11. =9*10
Subtract the smallest number from the greatest number
1
90
16

12. =6*14
44
78
84
3

13. =11*15
4
165
Arrainge #s from least to greatest and take the middle number or the average of the two middle #s
6

14. When is a number divisible by 4?

15. SQRT 100
20
10
85
9

16. =8*16
195
198
112
128

17. =2^10
512
Even
1 -024
729

18. =8*12
64
96
16
39

19. =11*11
162
380
77
121

20. SQRT 2
42
1.414213562
100
40

21. =4*6
5
16
24
Odd

22. =9*19
136
1 -024
171
105

23. =19*19
95
171
80
361

24. =3*19
57
225
64
306

25. =20^2
1 -024
8
228
400

26. =3*9
27
36
360
70

27. =9*14
4 -096
126
8
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)

28. Problem that asks you to choose a # of items to fill specific spots - when each spot is filled from a different source?
Multiply the # of choices for each of the spots
99
6
216

29. =17*17
255
289
81
Arrainge #s from least to greatest and take the middle number or the average of the two middle #s

30. Probability that A or B will happen?
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
A+B (Add both probabilities)
24
105

31. =12*14
6
114
5
168

32. =2^2
238
Undefined
27
4

33. =14*15
210
8
112
729

34. =6^1
9
6
20
36

35. =13*17
95
400
192
221

36. =3*17
8
51
A*B (Multiply both probabilities)
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)

37. =4^2
72
198
Amount of increase/original amount = x/100 (Then cross multiply to find x)
16

38. =6^5
7 -776
45
Itself
228

39. =9^2
225
81
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
512

40. 27^(1/3)
3
48
152
0 (any fraction with 0 on top is 0)

41. =10^6
1 -000 -000
1
108
224

42. =9*15
5
Base * Height
135
10

43. =7^3
32
225
70
343

44. Another way to write cube root 5
209
195
5^(1/3)
1 -000

45. =6*10
165
120
60
3 -125

46. 729^(1/3)
180
25
9
NO

47. 125^(1/3)
5
128
30
168

48. =10^1
144
102
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)
10

49. Pythagorean Triples (lengths)?
65
3:4:5 -- 5:12:13 -- 7:24:25
260
10 -000

50. SQRT 64
108
8
135
16