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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. =19*19
361
342
0 (any fraction with 0 on top is 0)
Number of outcomes you want/total number of possible outcomes

2. Multiplying Fractions
324
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)
x:x^(1/3):2x
Multiply the numerators and put the product over the product of the denominators

3. =11*15
5
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
165
72

4. =19*20
380
Multiply the # of choices for each of the spots
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
9

5. =4*9
238
209
54
36

6. =3*15
10
45
512
323

7. =5*8
40
169
91
27

8. =10^5
7
100 -000
Even
4

9. =8*18
96
48
144
140

10. =14*16
224
It becomes positive
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
240

11. =17*17
289
255
216
80

12. =9*11
Amount of increase/original amount = x/100 (Then cross multiply to find x)
99
120
125

13. =11*19
209
8
Line up the decimal points and proceed as usual
210

14. =10^8
100 -000 -000
It gets smaller
33
54

15. SQRT 729
9
Even
27
144

16. =2^6
64
255
49
247

17. =4*14
196
180
108
56

18. Right Isosceles triangle (lengths)?
NO
100
280
Side - Side - Side^2

19. Any number to the first power is?
Itself
320
76
40

20. =5*15
27
75
225
10

21. =9*12
0 (any fraction with 0 on top is 0)
247
108
216

22. =8*11
88
153
56
It gets smaller

23. =7*17
119
57
18
81

24. =4*7
44
125
5^(1/3)
28

25. =3*6
27
It gets smaller
18
256

26. =20*20
270
266
400
216

27. =15^2
4
225
The direction of the inequality symbol changes
30

28. =7^3
Even
72
343
256

29. =5^4
224
10
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller
625

30. =7*9
119
120
Odd
63

31. =5^1
5
80
120
1

32. =9^1
60
162
247
9

33. When is a number divisible by 3?
121
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
210
46 -656

34. =18*19
8
512
342
400

35. =12*12
224
1 -296
144
2pr

36. Adding or subtracting fractions with the same denominator
324
8
272
Add or subtract the numbers on top and keep the same denominator

37. Key to percent increase/decrease
Amount of increase/original amount = x/100 (Then cross multiply to find x)
4 -096
108
7

38. Basic probability formula?
Number of outcomes you want/total number of possible outcomes
66
30
Even

39. =6*16
Even
9
125
96

40. =4*13
9
52
8
60

41. =9*19
171
27
100 -000
0 (any fraction with 0 on top is 0)

42. SQRT 1 -296
228
208
8
36

43. =3*14
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
42
12
13

44. =13*13
238
70
169
59 -049

45. =11*18
198
729
Even
108

46. Pythagorean Triples (lengths)?
247
360
3:4:5 -- 5:12:13 -- 7:24:25
12

47. If you raise a positive fraction that is less than 1 to a power - what happens to the fraction?
It gets smaller
182
196
Pr^2

48. =8*20
272
Amount of increase/original amount = x/100 (Then cross multiply to find x)
Arrainge #s from least to greatest and take the middle number or the average of the two middle #s
160

49. =4*18
72
143
1 -024
Odd

50. What happens if you multiply or divide both sides of an inequality by a negative number?
The direction of the inequality symbol changes
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller - stop when all the places are taken
105
95