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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. =6^5
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
10 -000
7 -776
120

2. =6*16
144
8
96
228

3. =5*12
60
133
(b*h)/2
120

4. =7^2
49
56
54
187

5. When is a number divisible by 3?
255
100
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6

6. =5*17
20
6
100 -000
85

7. =9*19
224
171
85
x:x^(1/3):2x

8. SQRT 100
10
240
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
100

9. =4*15
6
100 -000
60
9

10. =9*12
80
108
100 -000
44

11. =3*6
Permutations ask for 'arraingements' Combinations ask for 'Groups'
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
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
18

12. =9*13
Pr^2
117
75
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller

13. SQRT 2 -401
100
49
Rate * Time = Distance (Hint: Draw a chart)
56

14. =5*8
11
40
100
10 -000 -000 -000

15. Does x^6 - x^2 = x^4?
300
NO
75
36

16. 216^(1/3)
Even
343
6
323

17. =7*11
169
7 -776
77
209

18. SQRT 400
Even
20
343
77

19. =9^2
168
0 (any fraction with 0 on top is 0)
81
64

20. Combinations: single source - order doesn't matter
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)
125
9
126

21. =12*17
105
204
25
10 -000

22. =7^3
5
343
195
Add or subtract the numbers on top and keep the same denominator

23. =10^1
729
10
27
121

24. =9*11
99
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller - stop when all the places are taken
50
Even

25. =3*4
12
Won't = 1 - Will
272
225

26. SQRT 225
NO
15
80
120

27. =3*14
128
42
7
Subtract the smallest number from the greatest number

28. =3*16
48
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)
NO
343

29. Adding and Subtracting Decimals
Permutations ask for 'arraingements' Combinations ask for 'Groups'
Side - Side - Side^2
Line up the decimal points and proceed as usual
135

30. =3*19
64
Side - Side - Side^2
57
162

31. =4^4
512
256
10
72

32. =11*16
272
72
280
176

33. Permutations: single source - order matters BUT only for a selection
240
60
10 -000
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller - stop when all the places are taken

34. =4*7
10 -000
28
Won't = 1 - Will
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

35. =9*14
285
Odd
8
126

36. =11*12
132
3
36
121

37. =17*19
4
133
323
125

38. SQRT 25
5
7 -776
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
1 -000 -000 -000

39. =7*14
98
48
140
42

40. =5*15
176
128
52
75

41. SQRT 81
36
Even
9
8

42. =13*13
169
NO
Permutations ask for 'arraingements' Combinations ask for 'Groups'
88

43. =9*17
64
One (1)
1
153

44. =4*4
7 -776
512
3
16

45. =18*20
16
42
247
360

46. =3*10
30
It gets smaller
182
132

47. =14*16
8
216
224
323

48. Permutations: single source - order matters
224
24
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller
81

49. =8*10
63
108
114
80

50. =2^3
5
182
8
24