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

2. =8*20
Number of outcomes you want/total number of possible outcomes
160
256
209

3. =5*14
70
36
1 -024
1.732050808

4. even x even =
Even
1 -000 -000
208
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)

5. =8*8
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)
252
64
NO

6. =7*11
77
64
4
25

7. =3^1
3
133
24
2 -401

8. =11*11
625
64
0 (any fraction with 0 on top is 0)
121

9. Dividing Decimals
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
128
187
36

10. =12*15
77
7
243
180

11. SQRT 6 -561
108
81
55
8

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

13. Probability that A and B will both happen?
156
15
0 (any fraction with 0 on top is 0)
A*B (Multiply both probabilities)

14. =14*18
252
104
64
NO

15. =11^2
625
121
Undefined
65

16. how do you find the range of a set of numbers?
64
44
3
Subtract the smallest number from the greatest number

17. =3^5
36
10 -000 -000 -000
9
243

18. =8*19
80
266
152
260

19. =4*8
220
32
Add their exponents (6^2 *6^3 = 6^5)
39

20. SQRT 9
144
3
Even
280

21. =6*11
NO
270
66
85

22. When is a number divisible by 6?
Difference in the y-coordinates over the difference in the x coodinates
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)
60
A+B (Add both probabilities)

23. SQRT 1 -024
49
7
247
32

24. =9*10
56
90
240
6

25. Permutations: single source - order matters BUT only for a selection
255
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller - stop when all the places are taken
125
91

26. =13*13
240
169
114
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

27. =3^3
27
Even
102
49

28. =8*13
224
104
100
81

29. =10^8
100 -000 -000
216
Subtract the smallest number from the greatest number
3

30. =4*4
4
80
16
13

31. =9*16
144
117
10 -000 -000
240

32. =8*18
112
144
48
64

33. =11*12
132
221
1.414213562
25

34. =15*18
Itself
270
187
36

35. SQRT 256
8
98
16
162

36. =5*8
100 -000
40
125
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)

37. =5^2
64
Even
104
25

38. =14*19
266
16
7
1.732050808

39. Circumference of a circle?
Odd
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller - stop when all the places are taken
90
2pr

40. =6*7
Add or subtract the numbers on top and keep the same denominator
81
10 -000 -000 -000
42

41. even + even =
5
243
Even
6

42. SQRT 2 -401
49
64
260
10 -000

43. =3*9
238
27
Side - Side - Side^2
1.732050808

44. =20*20
120
10 -000
400
56

45. =9*17
125
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
220
153

46. =3^6
300
2 -401
729
Arrainge #s from least to greatest and take the middle number or the average of the two middle #s

47. =5^5
180
3 -125
77
320

48. =16*19
2
90
64
304

49. =13*17
221
55
512
153

50. =6^4
27
126
228
1 -296