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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*13
144
512
729
156

2. =6*8
48
120
114
10

3. =7*7
49
Will = 1 - Won't
Permutations ask for 'arraingements' Combinations ask for 'Groups'
9

4. =15*17
255
4
126
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

5. When is a number divisible by 6?
48
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)
64
240

6. =13*14
32
182
198
512

7. =18*20
152
360
285
6

8. =4*10
40
15
160
64

9. =8*19
136
85
9
152

10. =11*19
8
5
64
209

11. =3*12
36
7
3
64

12. Combinations: single source - order doesn't matter
160
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)
8
48

13. =13*18
64
234
84
120

14. Basic probability formula?
7 -776
Number of outcomes you want/total number of possible outcomes
1 -000 -000 -000
48

15. =4*15
60
90
45
1 -296

16. =5*17
9
56
85
59 -049

17. =15*20
255
42
300
65

18. When is a number divisible by 6?
Undefined
Invert (reciprocal) the second fraction and multiply
300
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)

19. SQRT 100 -000 -000
10 -000
6
36
4 -096

20. =11*13
143
117
343
70

21. =12*12
210
144
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
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)

22. SQRT 36
3
6
72
8

23. =12*15
35
180
Won't = 1 - Will
144

24. If you raise a positive fraction that is less than 1 to a power - what happens to the fraction?
18
7
It gets smaller
400

25. =4*20
80
252
9
144

26. =7*20
140
120
64
126

27. Does (x^2 + y^2 + z^2)/(x^2 + y^2) = z^2?
20
NO
48
169

28. =9^3
729
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)
48
1 -296

29. =3*20
340
60
625
280

30. =7^3
36
343
Will = 1 - Won't
Multiply both fractions to get a common denominator add or subtract as usual

31. =5*8
20
1.732050808
59 -049
40

32. =6^2
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)
24
45
36

33. =6*19
Multiply the numerators and put the product over the product of the denominators
114
91
90

34. When is a number divisible by 3?
64
256
Rate * Time = Distance (Hint: Draw a chart)
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)

35. =4^5
153
100
204
1 -024

36. Factor x^2-2xy+y^2
(x-y)^2
50
234
60

37. =17*19
143
64
323
126

38. =3*9
27
60
24
221

39. =7*14
98
180
104
25

40. =18*19
512
342
4 -096
54

41. Does x^6 - x^2 = x^4?
210
280
x:x^(1/3):2x
NO

42. =6*14
81
84
160
25

43. =10^10
10 -000 -000 -000
54
136
343

44. SQRT 729
4 -096
8
171
27

45. =8^2
48
160
7
64

46. Permutations: single source - order matters
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller
Odd
20
125

47. =5^3
306
125
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)
72

48. =5*11
176
144
55
216

49. =2^9
88
340
It becomes positive
512

50. =9*12
0 (any fraction with 0 on top is 0)
9
108
9