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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. =4*14
56
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
Add their exponents (6^2 *6^3 = 6^5)
15

2. =3*11
28
Odd
33
60

3. =3*3
10
256
400
9

4. =4^2
16
104
361
360

5. =7^1
208
128
7
27

6. =4*12
234
48
114
180

7. =3*6
18
240
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)
180

8. Basic probability formula?
Number of outcomes you want/total number of possible outcomes
204
108
x:x^(1/3):2x

9. =3*8
24
20
1 -000 -000 -000
252

10. Key to percent increase/decrease
136
Amount of increase/original amount = x/100 (Then cross multiply to find x)
60
180

11. SQRT 1 -024
133
30
32
42

12. =8^3
78
512
40
0 (any fraction with 0 on top is 0)

13. =3^3
143
Base * Height
45
27

14. =3^4
81
30
56
9

15. =15*16
240
30
66
121

16. =9*18
162
Multiply the numerators and put the product over the product of the denominators
10
44

17. =3^2
9
2pr
225
54

18. =20*20
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
400
35
11

19. =7*20
112
10 -000 -000 -000
44
140

20. =8*12
225
90
255
96

21. =3*9
It gets smaller
8
27
112

22. Problem that asks you to choose a # of items to fill specific spots - when each spot is filled from a different source?
Multiply the # of choices for each of the spots
4 -096
512
182

23. =17*17
20
77
2
289

24. =9*14
126
256
16
Itself

25. Circumference of a circle?
2pr
400
36
Line up the decimal points and proceed as usual

26. =3^1
56
40
3
27

27. =4^4
256
4
8
90

28. SQRT 3
30
1.732050808
46 -656
Even

29. =7*11
77
(x-y)^2
4
100

30. =13*15
6
195
Even
48

31. SQRT 64
8
44
256
NO

32. =6*14
84
Add their exponents (6^2 *6^3 = 6^5)
45
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

33. =4*11
5
247
340
44

34. =8*10
196
361
80
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)

35. Odds that something doesn't happen?

36. =3^5
49
24
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)
243

37. Dividing Decimals
13
121
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
Even

38. =12*13
Will = 1 - Won't
0 (any fraction with 0 on top is 0)
156
208

39. =9*19
27
46 -656
216
171

40. =2^10
100
Add or subtract the numbers on top and keep the same denominator
1 -024
247

41. even + even =
15
Even
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
64

42. =8^4
Odd
304
4 -096
57

43. =8*16
7 -776
128
12
A+B (Add both probabilities)

44. =4*4
90
16
169
Even

45. Factor x^2-2xy+y^2
64
6
(x-y)^2
80

46. =5*7
35
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
76
36

47. =25^2
343
18
625
5

48. =7*16
324
112
55
30

49. =6*12
126
Pick the # that occurs most frequently
260
72

50. =10^4
154
1 -000
10 -000
224