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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. =4^2
66
60
400
16

2. =4*16
256
Odd
64
625

3. =3*12
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
95
90
36

4. What is the difference between a permutation or a combination?
Combinations don't care about the order of the problems
36
153
143

5. =15*18
156
52
135
270

6. 4/0 =
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller
1 -024
54
Undefined

7. =8*17
136
Multiply the # of choices for each of the spots
16
Move the decimal to the right on both numbers until there is nothing to the right of the decimal

8. =5*17
195
85
128
171

9. =3^4
289
144
81
6 -561

10. =9*15
165
135
216
9

11. =16*20
10 -000
40
320
280

12. =6*11
66
361
195
1 -000

13. =3*13
57
39
1 -000 -000
100

14. =7*11
320
77
13
42

15. Combinations: single source - order doesn't matter
76
220
10 -000
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)

16. 30:60:90 Right Triangle (Lenghts)
176
10 -000 -000 -000
80
x:x^(1/3):2x

17. =12*16
3:4:5 -- 5:12:13 -- 7:24:25
Base * Height
192
The direction of the inequality symbol changes

18. =3*8
45
24
2 -401
64

19. =13*19
247
40
216
125

20. =10^7
75
238
36
10 -000 -000

21. =3*17
51
252
A*B (Multiply both probabilities)
80

22. =16*17
75
272
100
3 -125

23. =2^3
Pick the # that occurs most frequently
8
Odd
77

24. =13*18
77
234
1 -000
360

25. =4*15
100 -000
5
60
46 -656

26. =13*20
625
209
81
260

27. =9*19
57
8
171
77

28. =4*5
36
20
80
36

29. Multiplying Fractions
59 -049
Multiply the numerators and put the product over the product of the denominators
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
72

30. How do you find the mode of a set of numbers?
Side - Side - Side^2
180
Pick the # that occurs most frequently
Even

31. =8*14
5
Arrainge #s from least to greatest and take the middle number or the average of the two middle #s
1 -000 -000 -000
112

32. If you raise a negative number to an even power - what happens to the number?
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)
It becomes positive
156
100

33. =5^3
228
125
It gets smaller
70

34. =5*8
72
40
121
1.414213562

35. 512^(1/3)
49
8
198
48

36. =5*13
125
2
65
64

37. =11*14
Subtract the smallest number from the greatest number
154
119
70

38. When is a number divisible by 3?
156
81
96
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)

39. =8*19
252
152
729
108

40. =10^1
4
114
10
Won't = 1 - Will

41. Adding and Subtracting Decimals
88
Line up the decimal points and proceed as usual
125
Multiply both fractions to get a common denominator add or subtract as usual

42. Exponents - Multiplying numbers with same base
Add their exponents (6^2 *6^3 = 6^5)
75
50
225

43. Does (x^2 + y^2 + z^2)/(x^2 + y^2) = z^2?
60
24
NO
39

44. =2^4
208
16
114
238

45. SQRT 10 -000 -000 -000
216
Rate * Time = Distance (Hint: Draw a chart)
45
100 -000

46. =6*17
Pr^2
121
102
4

47. =11^2
5^(1/3)
64
A+B (Add both probabilities)
121

48. =11*11
56
343
121
3

49. =9*17
2
153
(x-y)^2
1 -000

50. Exponents - Dividing numbers with same base
Even
625
2 -401
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)

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