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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. Permutations: single source - order matters BUT only for a selection
1 -000 -000 -000
84
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller - stop when all the places are taken
36

2. =3*6
380
18
165
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6

3. Pythagorean Triples (lengths)?
80
3:4:5 -- 5:12:13 -- 7:24:25
42
20

4. =15*18
Even
225
270
3

5. =8*20
1 -296
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
160
Even

6. =3*11
323
91
33
176

7. =17*17
289
Combinations don't care about the order of the problems
144
Itself

8. =6^6
136
32
2pr
46 -656

9. If you raise a negative number to an even power - what happens to the number?
180
It becomes positive
25
153

10. SQRT 3
49
1.732050808
15
7

11. Order of operations
Odd
11
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)
5

12. =11*14
400
60
4
154

13. 216^(1/3)
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)
114
169
6

14. =3*13
39
165
144
36

15. =13*16
A+B (Add both probabilities)
208
36
3:4:5 -- 5:12:13 -- 7:24:25

16. =5^3
42
125
64
306

17. =10^5
126
160
5
100 -000

18. Area of a triangle?
27
10 -000
(b*h)/2
144

19. =11*12
80
132
64
Even

20. =5*11
Subtract the smallest number from the greatest number
59 -049
It gets smaller
55

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

22. 0/1 =
140
272
0 (any fraction with 0 on top is 0)
57

23. When is a number divisible by 4?

24. =4*4
324
209
128
16

25. Permutations: single source - order matters
256
238
182
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller

26. =12*16
95
One (1)
168
192

27. =3*3
9
117
221
270

28. Factor x^2-2xy+y^2
256
(x-y)^2
9
0 (any fraction with 0 on top is 0)

29. =10^10
100 -000 -000
10 -000 -000 -000
48
45

30. Adding or subtracting fractions with different denominators
A*B (Multiply both probabilities)
144
Multiply both fractions to get a common denominator add or subtract as usual
3

31. SQRT 2
6
1.414213562
16
64

32. =4*12
48
2 -401
112
24

33. Area of a circle?
128
Pr^2
85
324

34. =13*18
15
234
260
59 -049

35. SQRT 400
NO
x:x^(1/3):2x
20
224

36. =3*5
50
45
15
7

37. =6*19
114
Multiply the # of choices for each of the spots
280
Itself

38. SQRT 256
16
209
288
228

39. =2^4
16
Invert (reciprocal) the second fraction and multiply
32
128

40. =5^2
25
72
39
10

41. =6^5
7 -776
Difference in the y-coordinates over the difference in the x coodinates
228
59 -049

42. =12*13
72
234
80
156

43. =9*18
Even
45
55
162

44. Probability that A or B will happen?
A+B (Add both probabilities)
39
25
128

45. Odds that something doesn't happen?

46. =8*19
104
152
1
234

47. =8*13
270
104
49
119

48. =10^1
64
10
144
16

49. =14*16
224
228
340
1 -024

50. =8*8
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)
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)
64
A*B (Multiply both probabilities)