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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. =6^3
216
Odd
2
2

2. =4^3
Amount of increase/original amount = x/100 (Then cross multiply to find x)
91
64
Combinations don't care about the order of the problems

3. 125^(1/3)
5
42
66
285

4. =3*12
512
Even
40
36

5. =2^6
9
If it is divisible by both 2 and 3 (318 is because it is even and the sum of 3+1+8 is divisible by 3)
16
64

6. When is a number divisible by 6?
343
If it is divisible by both 2 and 3 (318 is because it is even and the sum of 3+1+8 is divisible by 3)
96
360

7. Permutations: single source - order matters
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller
36
(b*h)/2
1 -024

8. SQRT 1 -296
36
133
85
361

9. =9*19
625
171
100
247

10. SQRT 49
4
5
7
90

11. =8^2
64
4
225
27

12. =13*20
51
255
Multiply the numerators and put the product over the product of the denominators
260

13. Area of a triangle?
(b*h)/2
44
It gets smaller
100

14. =13*17
45
80
221
144

15. even x odd =
Even
8
Odd
20

16. =6*10
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
20
16
60

17. =8*18
144
Even
4 -096
8

18. =17*20
98
340
247
343

19. What happens if you multiply or divide both sides of an inequality by a negative number?
The direction of the inequality symbol changes
4 -096
216
180

20. =3^1
342
A+B (Add both probabilities)
176
3

21. =3*16
80
210
10
48

22. =5*15
42
255
220
75

23. Dividing Fractions
Rate * Time = Distance (Hint: Draw a chart)
7
221
Invert (reciprocal) the second fraction and multiply

24. =3*13
1 -000
x:x^(1/3):2x
15
39

25. =16*16
Itself
176
44
256

26. =6^5
128
136
120
7 -776

27. =4*8
32
1 -000 -000 -000
Even
168

28. =5^1
119
1 -024
108
5

29. =4*5
187
Odd
20
The direction of the inequality symbol changes

30. =16*17
176
60
272
55

31. =15*20
125
300
221
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)

32. =6^6
108
(x-y)^2
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
46 -656

33. Exponents - Dividing numbers with same base
64
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
45
234

34. Problem that asks you to choose a # of items to fill specific spots - when each spot is filled from a different source?
Number of outcomes you want/total number of possible outcomes
32
8
Multiply the # of choices for each of the spots

35. Dividing Decimals
4
99
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
154

36. =17*17
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
6
16
289

37. =4*18
64
36
76
72

38. =9*10
90
100 -000
57
25

39. =10^8
100 -000 -000
45
30
3:4:5 -- 5:12:13 -- 7:24:25

40. =7*17
119
8
72
40

41. =7*18
72
126
5
Combinations don't care about the order of the problems

42. =15*19
117
2
512
285

43. =2^7
210
60
7
128

44. =4^4
96
18
256
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)

45. =10^1
10
Even
16
72

46. SQRT 64
729
400
8
36

47. =9*18
162
35
343
32

48. Odds that at least one thing will happen?

49. =4*20
255
114
Undefined
80

50. =7*16
42
6
It becomes positive
112