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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. SQRT 1 -000 -000
1.732050808
1 -000
280
13

2. Pythagorean Triples (lengths)?
77
40
3:4:5 -- 5:12:13 -- 7:24:25
512

3. 0/1 =
0 (any fraction with 0 on top is 0)
108
1 -024
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)

4. SQRT 2 -401
1.414213562
49
Subtract the smallest number from the greatest number
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6

5. Does x^6 - x^2 = x^4?
105
289
4 -096
NO

6. Combinations: single source - order doesn't matter
2pr
84
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)

7. =9^4
Difference in the y-coordinates over the difference in the x coodinates
6 -561
81
4 -096

8. =5^1
729
20
70
5

9. 4/0 =
NO
33
Undefined
114

10. 8^(1/3)
40
45
240
2

11. =3*19
57
340
2pr
Arrainge #s from least to greatest and take the middle number or the average of the two middle #s

12. =10^9
1 -000 -000 -000
84
27
64

13. =11*20
133
54
60
220

14. =3^2
125
9
Rate * Time = Distance (Hint: Draw a chart)
100 -000

15. If you raise a positive fraction that is less than 1 to a power - what happens to the fraction?
The direction of the inequality symbol changes
27
It gets smaller
100 -000

16. =3^3
27
266
18
8

17. =3^5
512
10 -000
76
243

18. =16*16
256
Even
112
28

19. Area of a triangle?
256
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
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
(b*h)/2

20. =11*15
152
165
30
Odd

21. even + odd =
30
20
Odd
(b*h)/2

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

23. =7^3
343
65
42
64

24. =7^1
60
7
55
182

25. =6*14
1 -000
Add or subtract the numbers on top and keep the same denominator
3 -125
84

26. =7^3
Pick the # that occurs most frequently
343
Itself
256

27. =6*16
168
6
96
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)

28. Does x^2 + x^3 = x^5?
NO
196
176
39

29. SQRT 1 -296
36
512
64
42

30. =17*18
306
182
10 -000 -000
64

31. =7*14
85
270
98
225

32. =6^1
342
13
128
6

33. =6*10
60
10
90
0 (any fraction with 0 on top is 0)

34. =9*11
99
56
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
Line up the decimal points and proceed as usual

35. Basic probability formula?
300
Pr^2
Permutations ask for 'arraingements' Combinations ask for 'Groups'
Number of outcomes you want/total number of possible outcomes

36. =4*4
16
3:4:5 -- 5:12:13 -- 7:24:25
10
320

37. Exponents - Dividing numbers with same base
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
625
5^(1/3)
114

38. =2^9
98
512
156
25

39. Order of operations
64
108
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)
70

40. 729^(1/3)
625
247
9
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6

41. =5*13
176
65
10 -000
247

42. =4^3
72
91
64
112

43. When is a number divisible by 4?

44. =10^6
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
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)
1 -000 -000
49

45. =10^5
Add or subtract the numbers on top and keep the same denominator
100 -000
A*B (Multiply both probabilities)
112

46. 4/0 =
90
Add or subtract the numbers on top and keep the same denominator
Undefined
3 -125

47. =8*13
272
8
104
51

48. =6*12
(b*h)/2
7
39
72

49. =8*12
4
9
96
266

50. =15*16
It becomes positive
143
3:4:5 -- 5:12:13 -- 7:24:25
240