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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. =16*17
729
272
70
144

2. =11*20
81
220
35
It gets smaller

3. SQRT 64
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
5^(1/3)
8

4. =14*16
80
224
NO
39

5. =2^4
16
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
The direction of the inequality symbol changes
36

6. When is a number divisible by 3?
18
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
280

7. =3*8
88
27
48
24

8. =4*16
64
80
266
152

9. =12*14
10 -000 -000 -000
Line up the decimal points and proceed as usual
168
108

10. =5*7
289
90
35
8

11. SQRT 2 -401
49
27
10 -000 -000
8

12. =6^3
Will = 1 - Won't
3
216
343

13. =7*15
105
266
75
2 -401

14. =9*18
Combinations don't care about the order of the problems
162
256
45

15. 343^(1/3)
112
132
1.414213562
7

16. =13*15
195
4 -096
81
16

17. =9*16
NO
A*B (Multiply both probabilities)
3:4:5 -- 5:12:13 -- 7:24:25
144

18. =3^5
243
50
60
240

19. =5*8
40
85
240
7

20. 27^(1/3)
68
3
247
100

21. =10^2
100
180
220
243

22. =11*14
27
64
3 -125
154

23. How do you find the slope of a line?
Difference in the y-coordinates over the difference in the x coodinates
625
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)
25

24. =9*11
247
99
228
70

25. =6^6
46 -656
80
15
5

26. =5*19
95
64
49
63

27. Another way to write cube root 5
5^(1/3)
81
6 -561
60

28. =2^8
48
81
2
256

29. SQRT 4
2
13
4
234

30. =7^3
Undefined
2
343
80

31. =7^4
171
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
180
2 -401

32. Exponents - Multiplying numbers with same base
270
Add their exponents (6^2 *6^3 = 6^5)
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
300

33. =6*10
60
3:4:5 -- 5:12:13 -- 7:24:25
323
182

34. =15*18
35
9
Side - Side - Side^2
270

35. =6*6
44
36
Permutations ask for 'arraingements' Combinations ask for 'Groups'
90

36. =7*7
204
88
49
144

37. =4^4
Add their exponents (6^2 *6^3 = 6^5)
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
68
256

38. =2^5
171
30
32
3

39. =5*17
85
20
168
7

40. =4^3
27
64
16
68

41. Exponents - Raising a power to a power
343
104
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
256

42. odd x odd =
380
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
95
Odd

43. =4*20
165
80
49
15

44. SQRT 121
24
361
126
11

45. If you raise a negative number to an odd power - what happens to the number?
133
52
It gets smaller
10 -000

46. =4^1
380
49
512
4

47. =5*9
208
180
45
55

48. =7*11
84
77
2
60

49. =5*12
60
238
272
3 -125

50. Area of a parallelogram?
176
35
99
Base * Height