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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. 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
A*B (Multiply both probabilities)
Pr^2
8

2. =5*10
Even
3
50
32

3. SQRT 49
4
20
240
7

4. =11*11
77
Rate * Time = Distance (Hint: Draw a chart)
Undefined
121

5. =9*14
4
78
112
126

6. =18*20
152
160
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
360

7. =9^3
Difference in the y-coordinates over the difference in the x coodinates
182
76
729

8. 729^(1/3)
9
8
Pr^2
2pr

9. =9^3
729
A*B (Multiply both probabilities)
512
Line up the decimal points and proceed as usual

10. =7^3
4 -096
343
80
20

11. =6*12
72
2
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
One (1)

12. SQRT 100
NO
32
10
100

13. Probability that A and B will both happen?
360
33
A*B (Multiply both probabilities)
152

14. =4*12
7
48
Arrainge #s from least to greatest and take the middle number or the average of the two middle #s
76

15. even x odd =
Even
36
16
152

16. =11*16
176
126
1 -296
289

17. =6*10
Add or subtract the numbers on top and keep the same denominator
60
16
27

18. =10^7
20
The direction of the inequality symbol changes
105
10 -000 -000

19. SQRT 1 -024
32
4
33
13

20. =3^1
91
3
114
8

21. =7^3
90
169
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
343

22. 216^(1/3)
234
Multiply the numerators and put the product over the product of the denominators
6
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)

23. =14*19
266
342
1 -000
56

24. =12*12
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
144
36
8

25. =8*13
512
13
68
104

26. =4*4
16
(x-y)^2
625
1.732050808

27. =6^4
1 -296
33
7
300

28. =9*13
1 -000 -000 -000
117
176
119

29. When is a number divisible by 6?
5
59 -049
306
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)

30. =12*18
216
35
1 -000
88

31. 0/1 =
18
1 -000
1 -296
0 (any fraction with 0 on top is 0)

32. =5^4
625
3
13
65

33. =3*4
125
12
70
Base * Height

34. =5^3
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
3
Odd
125

35. =2^8
1 -000
Add their exponents (6^2 *6^3 = 6^5)
256
100 -000

36. =2^2
80
48
4
56

37. SQRT 10 -000
49
171
100
48

38. =4*15
60
121
4
260

39. SQRT 16
729
10 -000
7
4

40. SQRT 625
260
105
25
144

41. =10^8
57
136
100 -000 -000
3:4:5 -- 5:12:13 -- 7:24:25

42. =11*14
1 -024
5
154
A+B (Add both probabilities)

43. SQRT 6 -561
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
95
27
81

44. Area of a triangle?
40
176
105
(b*h)/2

45. What is the difference between a permutation or a combination?

46. 512^(1/3)
Won't = 1 - Will
180
80
8

47. SQRT 121
11
24
Combinations don't care about the order of the problems
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

48. =4^3
64
Line up the decimal points and proceed as usual
108
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)

49. =2^4
272
132
16
60

50. =8*8
39
One (1)
64
15