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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. =3*8
24
3
88
102

2. =5*10
100
209
Side - Side - Side^2
50

3. =8*20
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
99
Will = 1 - Won't
160

4. =8^4
Multiply both fractions to get a common denominator add or subtract as usual
35
59 -049
4 -096

5. =8*16
169
128
85
16

6. SQRT 1 -024
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller - stop when all the places are taken
Itself
126
32

7. 64^(1/3)
100
48
49
4

8. Order of operations
195
360
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)
40

9. 4/0 =
27
(b*h)/2
Undefined
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)

10. =10^2
One (1)
144
81
100

11. 0/1 =
A*B (Multiply both probabilities)
7
0 (any fraction with 0 on top is 0)
15

12. When is a number divisible by 3?
300
Subtract the smallest number from the greatest number
Permutations ask for 'arraingements' Combinations ask for 'Groups'
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)

13. SQRT 4
209
343
Number of outcomes you want/total number of possible outcomes
2

14. =14*19
238
255
30
266

15. =2^7
256
It gets smaller
8
128

16. even + odd =
46 -656
Odd
16
75

17. =4^4
10 -000
256
12
27

18. =5*8
3
156
40
400

19. =4*8
30
1 -296
32
225

20. =5^3
Odd
Line up the decimal points and proceed as usual
125
228

21. =6^6
46 -656
27
2
224

22. =2^3
117
13
8
343

23. Combinations: single source - order doesn't matter
Will = 1 - Won't
125
Undefined
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)

24. When is a number divisible by 4?

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25. odd + odd =
208
3
112
Even

26. SQRT 625
20
16
165
25

27. Probability that A and B will both happen?
7
A*B (Multiply both probabilities)
63
300

28. =7*16
4
240
72
112

29. =12*13
49
28
36
156

30. =19*20
64
48
380
2 -401

31. =4*20
70
228
10 -000 -000 -000
80

32. 0/1 =
Itself
0 (any fraction with 0 on top is 0)
234
24

33. How do you find the median of a set of numbers?
Arrainge #s from least to greatest and take the middle number or the average of the two middle #s
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
112
54

34. =10^8
100 -000 -000
63
512
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)

35. =11*17
234
Will = 1 - Won't
2
187

36. =13*19
2
25
247
266

37. =9*18
209
162
195
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller

38. =5^3
168
121
125
108

39. =17*20
16
340
65
13

40. =4*9
288
A+B (Add both probabilities)
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller
36

41. =11*16
176
7 -776
270
1.414213562

42. =5*11
90
361
25
55

43. =7*18
126
3:4:5 -- 5:12:13 -- 7:24:25
Add or subtract the numbers on top and keep the same denominator
Move the decimal to the right on both numbers until there is nothing to the right of the decimal

44. =5^2
84
4 -096
380
25

45. =20*20
400
It becomes positive
33
46 -656

46. =3*15
13
45
64
80

47. =13*15
11
88
195
729

48. =9^3
Even
729
1 -000 -000
32

49. =15*18
36
270
195
512

50. How do you tell if it's a permutation or combination?

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