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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. Dividing Fractions
162
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)
121
Invert (reciprocal) the second fraction and multiply

2. =2^7
48
3
11
128

3. =13*16
243
187
208
117

4. =2^3
10
8
256
51

5. 0/1 =
42
255
2
0 (any fraction with 0 on top is 0)

6. 4/0 =
2
56
Undefined
128

7. When is a number divisible by 6?
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)
192
Number of outcomes you want/total number of possible outcomes
Rate * Time = Distance (Hint: Draw a chart)

8. =8*19
729
152
25
64

9. Does (x^2 + y^2 + z^2)/(x^2 + y^2) = z^2?
50
NO
1 -296
Multiply the # of choices for each of the spots

10. =5*19
15
95
7
342

11. 729^(1/3)
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
320
9
140

12. =6*16
96
234
80
One (1)

13. =3*14
11
289
42
77

14. When is a number divisible by 4?

15. Distance Formula?
Rate * Time = Distance (Hint: Draw a chart)
10
176
Combinations don't care about the order of the problems

16. SQRT 3
1.732050808
1 -000 -000
361
3

17. SQRT 625
27
25
156
59 -049

18. =2^1
2
65
99
56

19. =7*7
400
272
49
126

20. =8*14
152
70
112
84

21. Permutations: single source - order matters BUT only for a selection
13
208
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller - stop when all the places are taken
7

22. =7*11
30
128
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)
77

23. Area of a circle?
27
153
90
Pr^2

24. =12*12
144
Multiply the numerators and put the product over the product of the denominators
60
3

25. =5*15
75
16
4
729

26. Adding and Subtracting Decimals
182
Line up the decimal points and proceed as usual
625
216

27. =4^3
85
64
210
135

28. =12*18
100 -000
216
10 -000 -000
32

29. =5^3
343
60
125
44

30. =7*14
11
98
320
1 -024

31. SQRT 1 -024
32
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
6
125

32. When is a number divisible by 3?
81
81
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
144

33. =3^4
625
81
289
234

34. =6*6
36
6
112
10 -000

35. =4*12
25
48
30
36

36. =4*16
1 -000 -000 -000
2 -401
32
64

37. =7*9
Multiply the # of choices for each of the spots
32
63
36

38. =12*20
240
Odd
304
95

39. =7^1
7
4
323
1 -000 -000 -000

40. =5^5
57
270
24
3 -125

41. =14*15
Add their exponents (6^2 *6^3 = 6^5)
210
108
63

42. =15*17
Line up the decimal points and proceed as usual
Rate * Time = Distance (Hint: Draw a chart)
255
247

43. SQRT 121
11
56
729
60

44. =5^3
10 -000
6
60
125

45. 125^(1/3)
320
7
5
75

46. =6*9
54
121
18
80

47. =10^7
42
729
10 -000 -000
361

48. =4*20
80
13
112
81

49. Basic probability formula?
49
Number of outcomes you want/total number of possible outcomes
51
10

50. =3*18
52
78
240
54