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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. =18*19
342
10 -000
Add their exponents (6^2 *6^3 = 6^5)
27

2. =9*15
40
323
72
135

3. =10^4
4 -096
272
10 -000
91

4. =5*16
320
60
210
80

5. =7*13
52
91
64
1 -296

6. =12*17
121
272
204
153

7. =11*19
105
209
64
100

8. =15*18
44
270
25
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)

9. Adding or subtracting fractions with the same denominator
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller - stop when all the places are taken
77
Add or subtract the numbers on top and keep the same denominator
140

10. =6*6
5
4
36
255

11. Any number to the negative power (y) is equal to?
260
224
27
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)

12. Does x^2 + x^3 = x^5?
50
35
70
NO

13. =4*15
Will = 1 - Won't
10 -000
60
4 -096

14. =7*19
133
121
2
25

15. =8*8
64
4 -096
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)
182

16. =6*16
12
96
5^(1/3)
361

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

18. When is a number divisible by 3?
117
48
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
Arrainge #s from least to greatest and take the middle number or the average of the two middle #s

19. Odds that something doesn't happen?

20. SQRT 400
1 -000
64
729
20

21. When is a number divisible by 3?
112
512
60
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)

22. Pythagorean Triples (lengths)?
180
171
77
3:4:5 -- 5:12:13 -- 7:24:25

23. even x even =
Even
165
Pr^2
64

24. SQRT 9
3
256
1 -000
729

25. =4*18
72
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
One (1)
95

26. =10^7
135
10 -000 -000
56
70

27. 4/0 =
66
Undefined
70
1

28. =3*13
81
0 (any fraction with 0 on top is 0)
Line up the decimal points and proceed as usual
39

29. =17*20
54
340
204
400

30. =7*8
81
36
88
56

31. =5*15
35
75
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
Side - Side - Side^2

32. =4*13
52
64
Won't = 1 - Will
50

33. 27^(1/3)
One (1)
3
171
Number of outcomes you want/total number of possible outcomes

34. =6^2
36
8
216
95

35. =9*16
144
16
6
2

36. =8*18
187
144
117
10 -000 -000 -000

37. =2^9
512
625
108
90

38. =4*7
28
306
180
27

39. Multiplying Fractions
30
Multiply the numerators and put the product over the product of the denominators
160
240

40. =5*5
143
25
52
340

41. SQRT 100
Line up the decimal points and proceed as usual
10
143
180

42. SQRT 169
2pr
13
154
75

43. =3*16
30
(x-y)^2
126
48

44. =3^6
64
729
49
3

45. =1^3
1 -024
1
48
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller

46. =17*17
1 -024
289
42
32

47. =11*11
72
Undefined
256
121

48. =9*11
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
10
729
99

49. Dividing Fractions
13
119
16
Invert (reciprocal) the second fraction and multiply

50. =4^3
64
289
280
98