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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*19
255
25
171
153

2. Dividing Decimals
108
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
64
180

3. Multiplying Fractions
84
Multiply the numerators and put the product over the product of the denominators
5
64

4. =8*13
104
128
135
289

5. Dividing Fractions
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
1 -296
Line up the decimal points and proceed as usual
Invert (reciprocal) the second fraction and multiply

6. =11*16
340
54
182
176

7. Odds that something doesn't happen?

8. =9*16
55
144
81
96

9. =14*20
132
289
42
280

10. =13*17
35
121
10
221

11. =3*16
59 -049
A+B (Add both probabilities)
48
4

12. =6*20
625
One (1)
49
120

13. 512^(1/3)
8
7
80
Pick the # that occurs most frequently

14. =6*11
66
2pr
76
It gets smaller

15. =12*18
12
216
75
144

16. =1^3
1
1 -024
Even
2pr

17. =5*17
85
144
625
216

18. =9*15
135
48
104
625

19. =12*19
68
x:x^(1/3):2x
1 -000
228

20. =10^10
10 -000 -000 -000
9
90
195

21. =4*11
44
7
57
5

22. =5^5
3 -125
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
4

23. =7^2
2
39
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
49

24. How do you find the median of a set of numbers?
Arrainge #s from least to greatest and take the middle number or the average of the two middle #s
208
3
60

25. Adding and Subtracting Decimals
Line up the decimal points and proceed as usual
5
64
2pr

26. =4*20
168
324
80
Even

27. SQRT 100 -000 -000
10 -000
1 -000 -000
7
8

28. =4^6
300
Pick the # that occurs most frequently
234
4 -096

29. odd x odd =
6
1 -000
80
Odd

30. =3*18
209
54
8
126

31. =16*16
195
209
98
256

32. =6^3
10
216
8
729

33. =6^6
0 (any fraction with 0 on top is 0)
225
5
46 -656

34. =6*18
1 -000 -000 -000
108
102
64

35. =5*9
45
68
243
128

36. =10^9
1 -000 -000 -000
132
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
25

37. =2^5
50
171
27
32

38. =7*20
140
65
5^(1/3)
196

39. SQRT 2
64
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
Base * Height
1.414213562

40. =7*15
75
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)
105
35

41. SQRT 10 -000 -000 -000
256
27
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller
100 -000

42. SQRT 729
27
55
24
210

43. =11*13
320
80
143
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6

44. =5*14
60
9
400
70

45. =4^3
42
64
156
Even

46. =8^2
60
64
24
204

47. =18*20
12
56
360
81

48. =12*20
11
240
1 -000 -000
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

49. =14*17
195
121
238
144

50. =8*9
117
20
72
Amount of increase/original amount = x/100 (Then cross multiply to find x)