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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. Area of a circle?
51
Multiply the numerators and put the product over the product of the denominators
7 -776
Pr^2

2. =5^2
25
72
84
228

3. 0/1 =
Even
0 (any fraction with 0 on top is 0)
NO
16

4. =9^3
152
729
228
A*B (Multiply both probabilities)

5. =8^1
36
33
8
9

6. =9^1
729
196
256
9

7. =3*14
220
48
42
28

8. =3^3
27
20
70
65

9. =9*12
256
198
152
108

10. =2^4
16
Add their exponents (6^2 *6^3 = 6^5)
280
36

11. SQRT 1 -024
Odd
32
192
NO

12. =8*9
44
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)
228
72

13. =5*7
35
63
180
Multiply the numerators and put the product over the product of the denominators

14. =16*16
It gets smaller
256
24
121

15. =6*17
Odd
20
1 -000
102

16. =13*17
100 -000
221
64
Will = 1 - Won't

17. =14*20
256
280
12
56

18. even x even =
153
Even
221
8

19. When is a number divisible by 3?
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller - stop when all the places are taken
6
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
10

20. =7^3
16
343
13
512

21. =5*20
16
2pr
100
1.732050808

22. =3*3
1.414213562
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
9
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)

23. =14*14
6
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
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)
196

24. When is a number divisible by 6?
288
25
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)
72

25. =11*16
176
Pick the # that occurs most frequently
65
15

26. =10^6
108
20
1 -000 -000
100

27. Permutations: single source - order matters
46 -656
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller
0 (any fraction with 0 on top is 0)
91

28. odd x odd =
Odd
5
2
Side - Side - Side^2

29. =4*5
144
20
60
36

30. =7*8
16
56
81
2

31. =6^5
7 -776
30
8
216

32. SQRT 10 -000
100
176
256
49

33. =7*19
169
Will = 1 - Won't
133
400

34. 27^(1/3)
152
3
98
10

35. Combinations: single source - order doesn't matter
44
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)
60
100

36. =20^2
216
400
11
6

37. =3*4
12
3
2 -401
209

38. =4*14
56
112
24
182

39. =7*18
Number of outcomes you want/total number of possible outcomes
126
168
60

40. =6*8
108
48
125
30

41. =4*16
30
2pr
198
64

42. =4*10
40
27
729
198

43. =5*12
10
300
60
255

44. =7^2
49
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller - stop when all the places are taken
Add or subtract the numbers on top and keep the same denominator
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)

45. =3*8
24
100
Odd
45

46. =7^3
Add their exponents (6^2 *6^3 = 6^5)
1 -000
343
9

47. =6*12
72
3 -125
15
128

48. =3*10
65
30
165
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)

49. =9*16
144
91
48
64

50. =11*12
204
2
132
6 -561