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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. =8*14
112
360
8
84

2. 4/0 =
Permutations ask for 'arraingements' Combinations ask for 'Groups'
234
Undefined
96

3. =8*16
380
Even
196
128

4. =4^6
It becomes positive
4 -096
81
100 -000

5. SQRT 25
5
75
2pr
114

6. =8*19
A*B (Multiply both probabilities)
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)
NO
152

7. =5*14
70
1 -000 -000
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)
320

8. =11^2
Difference in the y-coordinates over the difference in the x coodinates
121
Side - Side - Side^2
108

9. =4*9
36
Multiply the # of choices for each of the spots
10 -000
221

10. =6^1
6
16
104
285

11. how do you find the range of a set of numbers?
625
Subtract the smallest number from the greatest number
240
120

12. Does x^6 - x^2 = x^4?
57
84
192
NO

13. =4*20
80
One (1)
4
285

14. SQRT 400
198
20
100 -000 -000
27

15. SQRT 625
8
10 -000 -000 -000
84
25

16. Adding or subtracting fractions with the same denominator
Add or subtract the numbers on top and keep the same denominator
60
16
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)

17. Any number to the first power is?
Itself
96
81
Multiply the # of choices for each of the spots

18. =2^8
256
285
48
108

19. =16*20
320
96
48
78

20. Permutations: single source - order matters
108
1 -000
36
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller

21. =16*17
64
272
192
Even

22. Combinations: single source - order doesn't matter
288
196
81
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)

23. Exponents - Multiplying numbers with same base
1 -000
4
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller
Add their exponents (6^2 *6^3 = 6^5)

24. Area of a parallelogram?
Base * Height
Undefined
1 -024
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)

25. =17*17
289
49
180
98

26. =4*8
32
196
320
36

27. =9^3
729
125
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)
Amount of increase/original amount = x/100 (Then cross multiply to find x)

28. Does (x^2 + y^2 + z^2)/(x^2 + y^2) = z^2?
68
27
NO
162

29. =8^2
306
64
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller
35

30. SQRT 36
729
84
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
6

31. =16*19
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
729
304
143

32. Odds that something doesn't happen?

33. If you raise a negative number to an odd power - what happens to the number?
28
182
100
It gets smaller

34. =12*18
16
16
216
64

35. =10^1
11
114
256
10

36. =5*20
270
4
76
100

37. =10^8
100 -000 -000
3
66
0 (any fraction with 0 on top is 0)

38. =9*16
144
72
77
289

39. =14*19
360
10 -000
120
266

40. =9*9
81
729
25
4 -096

41. =5*19
120
95
216
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)

42. SQRT 729
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)
27
4 -096
6

43. =8*13
Side - Side - Side^2
104
270
156

44. =19*19
NO
125
10 -000 -000
361

45. =6^3
216
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)
280
182

46. =4*14
7 -776
180
56
25

47. 27^(1/3)
95
66
84
3

48. =8*18
3 -125
156
144
36

49. even x even =
Even
11
Multiply the # of choices for each of the spots
30

50. Circumference of a circle?
625
85
180
2pr