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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. =12*15
Will = 1 - Won't
180
208
x:x^(1/3):2x

2. =7*18
64
143
196
126

3. When is a number divisible by 3?
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
72
42
126

4. =15*20
48
168
300
192

5. Adding and Subtracting Decimals
120
104
Line up the decimal points and proceed as usual
1

6. SQRT 4 -096
40
64
4
216

7. Permutations: single source - order matters
171
60
400
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller

8. =4^6
625
4 -096
25
729

9. =12*18
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)
27
216
100 -000 -000

10. SQRT 1 -024
32
108
10 -000
8

11. =11*13
16
162
256
143

12. Permutations: single source - order matters BUT only for a selection
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller - stop when all the places are taken
260
306
105

13. =5^3
72
9
Even
125

14. =8^1
400
288
8
Number of outcomes you want/total number of possible outcomes

15. =4*8
209
32
64
Undefined

16. Area of a triangle?
16
49
5^(1/3)
(b*h)/2

17. Any number to the negative power (y) is equal to?
48
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)
342
24

18. =3*19
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)
57
10 -000 -000 -000
Won't = 1 - Will

19. =5*6
81
30
80
289

20. SQRT 100 -000 -000
10 -000
153
Pick the # that occurs most frequently
81

21. =5^3
125
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)
256
198

22. How do you find the median of a set of numbers?
1
Side - Side - Side^2
Add their exponents (6^2 *6^3 = 6^5)
Arrainge #s from least to greatest and take the middle number or the average of the two middle #s

23. =11*17
55
45
187
15

24. =7*20
216
240
40
140

25. 343^(1/3)
729
Side - Side - Side^2
63
7

26. =3*4
Subtract the smallest number from the greatest number
198
225
12

27. =7*8
11
56
272
400

28. =6*16
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
45
96
400

29. =7*14
100 -000
98
51
Even

30. =5*16
160
256
80
49

31. =4*4
400
143
90
16

32. Combinations: single source - order doesn't matter
72
125
36
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)

33. SQRT 6 -561
81
60
96
266

34. =7^4
4
108
Add their exponents (6^2 *6^3 = 6^5)
2 -401

35. =5*10
50
Subtract the smallest number from the greatest number
54
7 -776

36. =6*8
144
152
5
48

37. =5^4
NO
64
72
625

38. =20^2
64
400
25
256

39. SQRT 4
0 (any fraction with 0 on top is 0)
2
160
121

40. =16*17
289
152
272
342

41. SQRT 3
1.732050808
156
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller - stop when all the places are taken
Even

42. =5*19
120
2
196
95

43. =8*15
114
102
Multiply the numerators and put the product over the product of the denominators
120

44. =5^1
260
5
49
323

45. =9^4
162
154
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
6 -561

46. =3^2
64
16
96
9

47. =11*12
132
209
Difference in the y-coordinates over the difference in the x coodinates
Invert (reciprocal) the second fraction and multiply

48. If you raise a negative number to an odd power - what happens to the number?
76
128
72
It gets smaller

49. =10^9
3:4:5 -- 5:12:13 -- 7:24:25
It gets smaller
1 -000 -000 -000
32

50. =18*20
10 -000
36
125
360