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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. 27^(1/3)
285
Permutations ask for 'arraingements' Combinations ask for 'Groups'
3
100 -000

2. =5*15
10
90
Add their exponents (6^2 *6^3 = 6^5)
75

3. Exponents - Multiplying numbers with same base
Add their exponents (6^2 *6^3 = 6^5)
81
55
27

4. SQRT 10 -000 -000 -000
42
1 -024
100 -000
90

5. =5*18
90
119
3
15

6. =5*9
512
3 -125
45
7

7. Does x^6 - x^2 = x^4?
128
NO
176
6

8. =13*13
169
42
Combinations don't care about the order of the problems
9

9. =13*20
195
260
192
135

10. 216^(1/3)
125
238
6
NO

11. =14*14
Even
Arrainge #s from least to greatest and take the middle number or the average of the two middle #s
36
196

12. =5*8
18
4
72
40

13. =7*7
70
119
49
7 -776

14. =6*18
51
361
108
180

15. =4^6
42
16
99
4 -096

16. When is a number divisible by 6?
121
Will = 1 - Won't
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)
5

17. =6^2
36
1.414213562
Even
Subtract the smallest number from the greatest number

18. =6*15
64
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)
It gets smaller
90

19. =5*14
70
The direction of the inequality symbol changes
68
289

20. Key to percent increase/decrease
Amount of increase/original amount = x/100 (Then cross multiply to find x)
3
Odd
48

21. 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
60
Difference in the y-coordinates over the difference in the x coodinates
16

22. =12*12
144
45
Odd
76

23. =6*19
225
114
28
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

24. =9^5
8
160
59 -049
100 -000 -000

25. =7^3
NO
40
343
27

26. =11*15
165
10 -000
Odd
Side - Side - Side^2

27. =7^3
187
343
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
165

28. =12*16
192
224
72
300

29. =4*5
1.414213562
20
18
Multiply both fractions to get a common denominator add or subtract as usual

30. =13*14
80
(x-y)^2
182
5

31. =8*13
40
0 (any fraction with 0 on top is 0)
512
104

32. =3*8
4 -096
24
9
30

33. =3^1
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
3
10 -000 -000
121

34. =6*12
3 -125
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)
180
72

35. Dividing Decimals
7
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
Side - Side - Side^2
20

36. =18*19
169
68
342
306

37. =14*15
210
64
1 -000
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

38. how do you find the range of a set of numbers?
15
Odd
Subtract the smallest number from the greatest number
Difference in the y-coordinates over the difference in the x coodinates

39. =15*19
285
243
112
36

40. =5*19
56
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
288
95

41. Odds that at least one thing will happen?

42. even x even =
90
400
Even
380

43. How do you find the mode of a set of numbers?
Pick the # that occurs most frequently
64
1 -000 -000 -000
24

44. =8*18
234
133
144
One (1)

45. =8*20
160
(b*h)/2
15
85

46. 4/0 =
8
Undefined
343
2 -401

47. =3^3
112
4
32
27

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

49. What happens if you multiply or divide both sides of an inequality by a negative number?
The direction of the inequality symbol changes
144
125
100

50. =10^2
6
NO
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
100