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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. =16*16
270
256
16
153

2. =7*7
49
40
119
88

3. =3*12
90
36
729
75

4. =7*17
It gets smaller
NO
Odd
119

5. =20*20
80
25
400
36

6. =3*14
255
42
224
72

7. =6^3
2
1.414213562
216
Invert (reciprocal) the second fraction and multiply

8. =3*4
12
77
56
Invert (reciprocal) the second fraction and multiply

9. SQRT 100
95
Pick the # that occurs most frequently
8
10

10. Equation for a line?
32
6 -561
45
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

11. =9*20
160
49
33
180

12. =6*16
96
209
340
25

13. =11*20
72
247
220
256

14. 64^(1/3)
120
4
1
729

15. SQRT 16
4
1
228
1 -024

16. SQRT 225
46 -656
1
144
15

17. =13*15
Amount of increase/original amount = x/100 (Then cross multiply to find x)
81
195
80

18. SQRT 2 -401
Base * Height
49
15
39

19. SQRT 169
13
323
60
Rate * Time = Distance (Hint: Draw a chart)

20. SQRT 256
16
65
1 -000 -000
1 -000

21. even + odd =
10
5^(1/3)
Odd
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)

22. =13*20
260
Permutations ask for 'arraingements' Combinations ask for 'Groups'
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
72

23. Key to percent increase/decrease
Line up the decimal points and proceed as usual
48
(b*h)/2
Amount of increase/original amount = x/100 (Then cross multiply to find x)

24. SQRT 49
95
182
4
7

25. SQRT 100 -000 -000
144
10 -000
98
72

26. Permutations: single source - order matters BUT only for a selection
32
16
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller - stop when all the places are taken
121

27. =4*15
A+B (Add both probabilities)
60
72
28

28. =5*14
361
A+B (Add both probabilities)
70
Add their exponents (6^2 *6^3 = 6^5)

29. If you raise a negative number to an odd power - what happens to the number?
4
198
5^(1/3)
It gets smaller

30. =11*14
30
50
4
154

31. =4*18
133
72
255
64

32. =6*13
125
78
306
84

33. =5*12
5^(1/3)
6
60
187

34. SQRT 25
Permutations ask for 'arraingements' Combinations ask for 'Groups'
Won't = 1 - Will
5
121

35. =4*8
32
46 -656
It gets smaller
64

36. =3*8
361
102
24
132

37. Area of a circle?
Pr^2
16
15
120

38. 216^(1/3)
512
6
154
100

39. =4*19
209
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
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
76

40. =9*11
88
75
140
99

41. =4*17
16
121
Even
68

42. Exponents - Dividing numbers with same base
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
1
It gets smaller
162

43. =10^7
10 -000 -000
285
6
512

44. =10^8
64
102
100 -000 -000
10

45. =14*19
266
165
209
169

46. Adding or subtracting fractions with different denominators
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)
4
Multiply both fractions to get a common denominator add or subtract as usual
11

47. =10^3
Permutations ask for 'arraingements' Combinations ask for 'Groups'
1 -000
192
112

48. =18*18
324
40
104
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)

49. SQRT 4 -096
285
10
171
64

50. =3*19
6 -561
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
50
57