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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. =11*15
10
165
125
88

2. How do you tell if it's a permutation or combination?

3. =11*18
Even
100 -000 -000
24
198

4. =4^4
72
256
60
Even

5. SQRT 6 -561
81
Even
16
280

6. =7*18
252
126
112
8

7. =7*9
64
63
56
42

8. =8*10
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
35
80
Even

9. Problem that asks you to choose a # of items to fill specific spots - when each spot is filled from a different source?
108
9
4
Multiply the # of choices for each of the spots

10. =4*14
56
It becomes positive
144
It gets smaller

11. Exponents - Multiplying numbers with same base
24
Amount of increase/original amount = x/100 (Then cross multiply to find x)
7 -776
Add their exponents (6^2 *6^3 = 6^5)

12. =19*20
20
380
165
66

13. =6*18
36
108
12
285

14. =6*6
36
225
77
2

15. =5*18
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
96
90

16. =12*19
228
36
128
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)

17. SQRT 1 -024
9
256
32
196

18. 0/1 =
0 (any fraction with 0 on top is 0)
Odd
729
27

19. 512^(1/3)
4 -096
5
224
8

20. =9^3
Add their exponents (6^2 *6^3 = 6^5)
0 (any fraction with 0 on top is 0)
729
125

21. =13*14
114
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
182
54

22. =8^4
4 -096
99
Pick the # that occurs most frequently
100

23. =9*20
16
512
180
Add their exponents (6^2 *6^3 = 6^5)

24. =2^4
16
1
285
100 -000 -000

25. =16*20
Multiply the numerators and put the product over the product of the denominators
100
320
88

26. even + odd =
16
8
The direction of the inequality symbol changes
Odd

27. =4^6
16
4 -096
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
91

28. =9^3
729
24
320
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)

29. =13*17
625
70
40
221

30. =8^3
171
512
80
16

31. Pythagorean Triples (lengths)?
3:4:5 -- 5:12:13 -- 7:24:25
52
3
10 -000

32. =9*10
90
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
75
210

33. =5^3
125
240
270
81

34. =14*19
10
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
24
266

35. =6*14
84
0 (any fraction with 0 on top is 0)
125
160

36. =10^3
380
48
1 -000
6

37. =5^1
512
5
340
48

38. =4*17
39
68
361
156

39. =3*11
2
33
81
121

40. =10^2
2
182
100
220

41. SQRT 4 -096
It becomes positive
306
20
64

42. SQRT 169
Rate * Time = Distance (Hint: Draw a chart)
234
64
13

43. =4^2
144
216
32
16

44. =9*12
9
49
108
256

45. =20*20
112
16
216
400

46. What happens if you multiply or divide both sides of an inequality by a negative number?
The direction of the inequality symbol changes
Itself
324
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)

47. =10^4
10 -000 -000 -000
10 -000 -000
63
10 -000

48. =11*13
143
18
1 -000 -000
120

49. Order of operations
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
120
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)
180

50. =3*14
(x-y)^2
306
76
42