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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. =11*19
209
120
48
99

2. =2^5
32
1 -000
24
512

3. =7*18
Undefined
126
512
81

4. =8*13
140
104
15
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)

5. =9^4
6 -561
192
144
512

6. =9*19
98
171
72
1.414213562

7. =3*6
(b*h)/2
320
18
48

8. =2^4
7 -776
108
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

9. SQRT 25
84
5
126
40

10. SQRT 36
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
6
Pr^2
72

11. =4*14
NO
68
56
Combinations don't care about the order of the problems

12. Adding and Subtracting Decimals
180
Arrainge #s from least to greatest and take the middle number or the average of the two middle #s
NO
Line up the decimal points and proceed as usual

13. =9*11
Add their exponents (6^2 *6^3 = 6^5)
99
(x-y)^2
10

14. =15*17
255
1
100
260

15. =20^2
400
0 (any fraction with 0 on top is 0)
342
16

16. =7^3
32
180
195
343

17. =3*15
45
729
8
144

18. =4*5
6
20
30
48

19. =7*15
80
105
119
Multiply the numerators and put the product over the product of the denominators

20. =17*17
6
289
126
25

21. =7*9
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
63
51
96

22. Adding or subtracting fractions with the same denominator
Add or subtract the numbers on top and keep the same denominator
256
Add their exponents (6^2 *6^3 = 6^5)
234

23. 343^(1/3)
2
9
7
100

24. =3*11
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)
0 (any fraction with 0 on top is 0)
Combinations don't care about the order of the problems
33

25. SQRT 2 -401
5
400
225
49

26. =7*7
3:4:5 -- 5:12:13 -- 7:24:25
4 -096
126
49

27. SQRT 49
Undefined
7
Even
136

28. =19*20
36
Amount of increase/original amount = x/100 (Then cross multiply to find x)
36
380

29. =4^3
5
1 -296
49
64

30. Odds that at least one thing will happen?

31. What is the difference between a permutation or a combination?

32. =5*5
243
24
25
11

33. Exponents - Dividing numbers with same base
625
Pr^2
1 -000 -000 -000
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)

34. odd x odd =
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
It becomes positive
136
Odd

35. =4*20
2
80
195
5

36. =15*16
360
240
216
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)

37. When is a number divisible by 4?

38. Exponents - Raising a power to a power
228
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
70
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6

39. Distance Formula?
32
15
Rate * Time = Distance (Hint: Draw a chart)
625

40. =4^6
13
208
4 -096
54

41. 512^(1/3)
280
9
8
7

42. even + even =
15
512
247
Even

43. =9*17
3 -125
30
320
153

44. =18*19
340
81
187
342

45. =6*10
3
60
154
256

46. =17*20
340
64
It gets smaller
260

47. =7*19
133
120
125
289

48. 4/0 =
729
Undefined
Multiply the numerators and put the product over the product of the denominators
4

49. =15^2
44
48
A+B (Add both probabilities)
225

50. =3*17
51
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
27