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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. 0/1 =
10 -000
0 (any fraction with 0 on top is 0)
625
4

2. =5*9
39
Number of outcomes you want/total number of possible outcomes
45
117

3. Any number to the negative power (y) is equal to?
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)
120
285
112

4. =9*15
135
272
10 -000
39

5. =13*16
52
126
208
10

6. =16*18
63
100
512
288

7. =9^5
59 -049
28
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
10

8. SQRT 81
216
25
104
9

9. =6*18
3
0 (any fraction with 0 on top is 0)
102
108

10. =13*15
5
54
195
77

11. Area of a parallelogram?
25
Base * Height
84
64

12. Order of operations
16
15
32
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)

13. =13*14
112
182
Even
55

14. =14*18
45
729
252
2

15. =12*13
6 -561
1 -000 -000
156
81

16. =5*12
9
60
25
27

17. =4^3
2
64
100 -000
119

18. SQRT 400
11
20
1 -000
6 -561

19. Odds that at least one thing will happen?

20. =7*7
24
70
Amount of increase/original amount = x/100 (Then cross multiply to find x)
49

21. =5*15
96
126
75
20

22. =5*7
5^(1/3)
59 -049
35
46 -656

23. =20^2
5
343
216
400

24. =8*13
59 -049
729
119
104

25. 729^(1/3)
729
165
9
11

26. When is a number divisible by 6?
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)
48
Combinations don't care about the order of the problems
36

27. If you raise a negative number to an even power - what happens to the number?
209
88
It becomes positive
60

28. =8*19
119
152
256
5

29. =2^3
x:x^(1/3):2x
8
120
10 -000

30. 512^(1/3)
210
8
63
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)

31. =6*14
70
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
16
84

32. even + odd =
1
169
234
Odd

33. Pythagorean Triples (lengths)?
3:4:5 -- 5:12:13 -- 7:24:25
225
192
56

34. =3*20
Multiply both fractions to get a common denominator add or subtract as usual
100
60
8

35. =7*18
126
7 -776
343
One (1)

36. Factor x^2-2xy+y^2
(x-y)^2
Multiply the # of choices for each of the spots
Odd
36

37. =5^5
3 -125
Add or subtract the numbers on top and keep the same denominator
204
120

38. =19*19
125
36
361
304

39. =8*10
51
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
80
143

40. =6^3
126
4
108
216

41. Does (x^2 + y^2 + z^2)/(x^2 + y^2) = z^2?
77
7
NO
49

42. =8*17
136
1.732050808
10
20

43. 4/0 =
4
9
125
Undefined

44. How do you find the slope of a line?
72
Difference in the y-coordinates over the difference in the x coodinates
99
128

45. SQRT 25
260
153
16
5

46. Permutations: single source - order matters BUT only for a selection
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller - stop when all the places are taken
48
288
289

47. 343^(1/3)
625
7
81
80

48. Combinations: single source - order doesn't matter
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)
154
168
238

49. Does x^6 - x^2 = x^4?
It gets smaller
360
252
NO

50. =15*15
11
729
225
80