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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. =7^2
49
60
Invert (reciprocal) the second fraction and multiply
15

2. =9*11
247
120
20
99

3. =3*3
9
56
210
Move the decimal to the right on both numbers until there is nothing to the right of the decimal

4. =3*19
143
57
81
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

5. =5*20
Won't = 1 - Will
91
100
65

6. =14*14
Line up the decimal points and proceed as usual
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller
196

7. If you raise a negative number to an even power - what happens to the number?
It becomes positive
48
135
Odd

8. =14*17
Will = 1 - Won't
2
238
Add their exponents (6^2 *6^3 = 6^5)

9. SQRT 6 -561
48
220
100 -000
81

10. =15*17
255
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
51
125

11. =11*14
24
85
154
65

12. When is a number divisible by 4?

13. =10^1
2 -401
10
64
343

14. =11*18
126
198
18
16

15. =9^1
9
Amount of increase/original amount = x/100 (Then cross multiply to find x)
30
156

16. how do you find the range of a set of numbers?
64
2
Subtract the smallest number from the greatest number
216

17. =13*14
182
126
221
6

18. =9*17
5^(1/3)
153
209
7 -776

19. Area of a triangle?
(b*h)/2
162
512
59 -049

20. 4/0 =
10 -000 -000
33
Undefined
81

21. =6*20
225
64
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)
120

22. Any number to the 0 power is?
76
171
2 -401
One (1)

23. =3*18
Won't = 1 - Will
10 -000 -000
54
114

24. SQRT 169
15
5^(1/3)
105
13

25. =5*6
342
Number of outcomes you want/total number of possible outcomes
90
30

26. =3*9
Undefined
27
80
128

27. =8*8
64
512
98
224

28. =8*15
Side - Side - Side^2
247
120
45

29. Permutations: single source - order matters BUT only for a selection
Odd
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller - stop when all the places are taken
144
169

30. =15^2
16
56
225
5

31. =5^2
120
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)
25
Even

32. =9^3
33
360
512
729

33. 8^(1/3)
36
2
72
64

34. =5^3
50
54
225
125

35. =8*13
104
It gets smaller
72
48

36. SQRT 81
9
2
Itself
240

37. =10^3
16
256
1 -000
9

38. =13*19
24
247
32
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)

39. Distance Formula?
1.732050808
3:4:5 -- 5:12:13 -- 7:24:25
Rate * Time = Distance (Hint: Draw a chart)
A*B (Multiply both probabilities)

40. =3*4
8
Pr^2
12
80

41. =4^2
16
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)
90
5

42. How do you find the mode of a set of numbers?
340
192
343
Pick the # that occurs most frequently

43. =20*20
100
Add their exponents (6^2 *6^3 = 6^5)
400
2

44. =3^6
729
209
4 -096
119

45. =4^4
(x-y)^2
195
210
256

46. =7*16
154
81
66
112

47. =9*15
3
8
135
77

48. Odds that at least one thing will happen?

49. SQRT 10 -000
2
4
100
162

50. Exponents - Raising a power to a power
x:x^(1/3):2x
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
Itself
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6