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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. =20*20
400
512
It becomes positive
288

2. =3*19
NO
57
361
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)

3. When is a number divisible by 4?

4. =5*9
320
45
27
304

5. =4^4
49
512
256
24

6. =10^5
100 -000
64
64
91

7. =11*11
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
121
68
4 -096

8. =9*19
27
98
64
171

9. =6*15
90
33
256
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller - stop when all the places are taken

10. =13*16
1
208
4
36

11. =8*18
70
55
144
1 -000 -000

12. =2^1
2
195
112
Multiply the numerators and put the product over the product of the denominators

13. When is a number divisible by 4?

14. =13*18
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
Permutations ask for 'arraingements' Combinations ask for 'Groups'
234
6

15. =2^2
196
729
100
4

16. =3^2
9
Side - Side - Side^2
182
6

17. =7*7
68
140
220
49

18. =19*19
32
260
40
361

19. =5^1
48
5
91
Pr^2

20. =5*16
1 -000 -000
80
162
260

21. =4*11
216
5^(1/3)
44
54

22. =5*8
40
133
162
2pr

23. =7^1
7
221
256
209

24. =17*18
3 -125
306
(b*h)/2
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. =6*16
Even
96
156
Invert (reciprocal) the second fraction and multiply

26. =12*12
323
10 -000
10 -000
144

27. =10^3
2
135
1 -000
187

28. =15*19
5
285
88
3

29. =4^3
729
64
24
Will = 1 - Won't

30. =12*15
36
x:x^(1/3):2x
180
100 -000

31. =14*20
Even
280
72
60

32. multiplying decimals
81
100
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
128

33. =8*16
128
15
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
234

34. How do you find the median of a set of numbers?
Arrainge #s from least to greatest and take the middle number or the average of the two middle #s
133
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
156

35. =5^4
121
Add or subtract the numbers on top and keep the same denominator
625
Add their exponents (6^2 *6^3 = 6^5)

36. SQRT 16
36
3:4:5 -- 5:12:13 -- 7:24:25
4
48

37. =15*18
512
77
270
70

38. =13*15
195
91
132
20

39. =20^2
400
128
20
63

40. SQRT 2
45
1.414213562
153
176

41. SQRT 1 -000 -000
135
36
1 -000
27

42. Adding or subtracting fractions with the same denominator
Add or subtract the numbers on top and keep the same denominator
121
30
36

43. =7*15
Combinations don't care about the order of the problems
2
Odd
105

44. =12*19
Invert (reciprocal) the second fraction and multiply
228
25
(x-y)^2

45. =15*20
84
224
300
85

46. =2^3
5
49
8
25

47. =3*3
10 -000 -000 -000
48
48
9

48. =15*17
60
323
255
10 -000 -000

49. =5*11
55
36
120
80

50. =12*13
5
176
266
156