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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. =9*9
54
81
25
18

2. =5*16
80
It gets smaller
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
285

3. =5^5
234
380
3 -125
360

4. even x odd =
135
40
33
Even

5. =7*16
Pick the # that occurs most frequently
Even
112
380

6. =6*6
4 -096
210
36
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller

7. =3^6
1 -000
729
80
128

8. 729^(1/3)
216
5
9
8

9. Dividing Decimals
1 -000
4
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
27

10. =11*18
(b*h)/2
4 -096
0 (any fraction with 0 on top is 0)
198

11. SQRT 10 -000
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
100
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller
(b*h)/2

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

13. =6*15
238
52
280
90

14. =15*18
Even
11
195
270

15. Adding and Subtracting Decimals
512
5
1.732050808
Line up the decimal points and proceed as usual

16. =3*11
340
33
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
Pick the # that occurs most frequently

17. =7*7
304
49
140
It becomes positive

18. =12*18
216
196
1
3

19. =7*10
Even
39
9
70

20. SQRT 6 -561
45
400
81
1 -024

21. =4*17
8
68
Invert (reciprocal) the second fraction and multiply
27

22. SQRT 10 -000 -000 -000
30
2
A*B (Multiply both probabilities)
100 -000

23. =5^3
77
6 -561
Pr^2
125

24. =5*19
119
95
49
36

25. =15*20
300
60
7
4

26. Distance Formula?
Rate * Time = Distance (Hint: Draw a chart)
(b*h)/2
NO
182

27. =9*19
324
171
1 -024
100

28. =3*9
1 -024
4 -096
27
48

29. =4*11
44
108
x:x^(1/3):2x
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

30. =5*7
52
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)
35
208

31. =14*20
100
288
280
8

32. =5*10
46 -656
56
133
50

33. Factor x^2-2xy+y^2
3
(x-y)^2
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
2 -401

34. =9*13
117
625
165
324

35. =5*9
45
225
8
91

36. 27^(1/3)
3
60
0 (any fraction with 0 on top is 0)
7

37. =13*16
6
208
15
512

38. =19*20
96
380
42
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)

39. =3*16
48
9
Undefined
8

40. odd + odd =
Even
27
60
136

41. Combinations: single source - order doesn't matter
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)
64
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)
Move the decimal to the right on both numbers until there is nothing to the right of the decimal

42. =4*8
143
81
7 -776
32

43. =5*11
55
400
It becomes positive
4

44. Exponents - Raising a power to a power
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
85
49
Add their exponents (6^2 *6^3 = 6^5)

45. =7^4
204
64
2 -401
256

46. How do you find the slope of a line?
Difference in the y-coordinates over the difference in the x coodinates
48
176
44

47. =17*19
Pick the # that occurs most frequently
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)
40
323

48. =11*12
729
195
300
132

49. =4^5
45
1 -024
Base * Height
2 -401

50. =6^5
30
95
7 -776
121