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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. =3*10
30
It becomes positive
128
108

2. =3*17
9
Won't = 1 - Will
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller
51

3. =6*13
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)
78
13
105

4. =3*20
60
3
Number of outcomes you want/total number of possible outcomes
4 -096

5. =12*15
98
36
180
128

6. =5*9
64
228
45
50

7. =17*18
85
255
306
0 (any fraction with 0 on top is 0)

8. What happens if you multiply or divide both sides of an inequality by a negative number?
The direction of the inequality symbol changes
90
729
(x-y)^2

9. =16*19
198
144
108
304

10. =3*9
Will = 1 - Won't
112
400
27

11. Basic probability formula?
Number of outcomes you want/total number of possible outcomes
60
42
9

12. =10^5
16
100 -000
40
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)

13. Adding or subtracting fractions with different denominators
153
198
Multiply both fractions to get a common denominator add or subtract as usual
Add their exponents (6^2 *6^3 = 6^5)

14. odd x odd =
Odd
400
625
512

15. =5*15
75
255
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
342

16. =6*7
27
42
27
3 -125

17. When is a number divisible by 4?

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18. Pythagorean Triples (lengths)?
16
3:4:5 -- 5:12:13 -- 7:24:25
5
128

19. When is a number divisible by 4?

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20. =6^3
729
216
9
143

21. =19*20
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
625
380
300

22. Exponents - Multiplying numbers with same base
Add their exponents (6^2 *6^3 = 6^5)
60
Undefined
90

23. =5^1
75
51
Won't = 1 - Will
5

24. SQRT 1 -000 -000
32
220
1 -000
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

25. multiplying decimals
30
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
25
72

26. =4*18
54
72
120
160

27. =8*14
25
27
221
112

28. =4*19
It becomes positive
27
76
8

29. SQRT 2 -401
96
18
49
63

30. SQRT 121
1.732050808
10
11
169

31. Area of a circle?
243
Pr^2
15
304

32. even + odd =
10
2
Pr^2
Odd

33. =16*17
121
4
272
Even

34. =4*17
260
36
68
4 -096

35. =8^1
128
209
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)
8

36. =13*16
208
51
It becomes positive
54

37. =20*20
15
44
400
0 (any fraction with 0 on top is 0)

38. =7*11
5
77
Odd
32

39. SQRT 16
125
182
It gets smaller
4

40. Does x^2 + x^3 = x^5?
126
NO
198
100 -000

41. =8^2
4 -096
300
64
Multiply the numerators and put the product over the product of the denominators

42. =13*17
Odd
323
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
221

43. =5*16
Itself
512
27
80

44. =7*12
NO
342
3
84

45. =8*12
96
195
64
1 -024

46. SQRT 729
Undefined
4
27
162

47. =4^4
256
171
380
59 -049

48. =11*11
160
234
121
224

49. =4*16
81
90
216
64

50. =3^3
162
30
Base * Height
27