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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. Adding or subtracting fractions with the same denominator
It becomes positive
252
144
Add or subtract the numbers on top and keep the same denominator

2. How do you find the median of a set of numbers?
Rate * Time = Distance (Hint: Draw a chart)
54
Arrainge #s from least to greatest and take the middle number or the average of the two middle #s
36

3. =3*6
18
4 -096
36
108

4. =14*18
171
252
NO
80

5. Dividing Fractions
3 -125
Invert (reciprocal) the second fraction and multiply
5^(1/3)
196

6. =10^2
Multiply the # of choices for each of the spots
90
100
343

7. Exponents - Raising a power to a power
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)
176
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
99

8. =4*17
68
340
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)
9

9. =5*6
35
30
143
72

10. Probability that A and B will both happen?
A*B (Multiply both probabilities)
4
80
84

11. =5^3
Pr^2
49
125
24

12. =6^4
1 -296
It gets smaller
25
60

13. =25^2
One (1)
144
625
76

14. 125^(1/3)
228
5
289
209

15. =11*20
196
10
220
32

16. =16*17
64
272
36
60

17. Multiplying Fractions
20
64
Multiply the numerators and put the product over the product of the denominators
Add or subtract the numbers on top and keep the same denominator

18. 729^(1/3)
9
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
4
512

19. =3^1
3
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
266
65

20. Permutations: single source - order matters
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller
50
54
49

21. SQRT 10 -000 -000 -000
270
1 -024
4
100 -000

22. =6*18
108
51
360
96

23. =18*19
225
380
288
342

24. =2^4
16
It gets smaller
Multiply the # of choices for each of the spots
84

25. =11*16
40
176
6
44

26. SQRT 9
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)
2pr
3
81

27. =18*20
6
360
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
512

28. SQRT 10 -000
100
46 -656
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)
16

29. =9*15
135
54
51
120

30. =10^6
1 -000 -000
27
54
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller - stop when all the places are taken

31. =15*18
729
33
270
27

32. =12*17
36
48
36
204

33. =12*16
192
289
84
63

34. SQRT 2 -401
49
153
33
4

35. Area of a circle?
81
32
51
Pr^2

36. =5^3
125
196
60
198

37. SQRT 256
9
225
121
16

38. SQRT 64
8
50
104
216

39. =5*11
255
55
16
144

40. 4/0 =
Undefined
Invert (reciprocal) the second fraction and multiply
10 -000 -000
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)

41. =6*19
88
2 -401
114
176

42. 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--but the number of choices keeps getting smaller
2
Even
Multiply the # of choices for each of the spots

43. =3*5
8
15
252
5^(1/3)

44. even + odd =
160
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)
343
Odd

45. =9^2
The direction of the inequality symbol changes
81
216
20

46. odd x odd =
136
Odd
30
10 -000

47. =3*15
64
45
18
117

48. =2^10
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)
1 -024
60
225

49. =5*19
144
95
198
126

50. =4*16
75
(x-y)^2
10 -000 -000 -000
64