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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. Right Isosceles triangle (lengths)?
Side - Side - Side^2
1 -000
48
55

2. SQRT 81
162
9
27
Invert (reciprocal) the second fraction and multiply

3. =15*20
300
50
39
114

4. =7*12
48
Even
182
84

5. =7*9
133
63
72
5^(1/3)

6. =5*19
260
95
304
209

7. =8^2
1 -296
64
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller
3:4:5 -- 5:12:13 -- 7:24:25

8. Adding or subtracting fractions with different denominators
153
Multiply both fractions to get a common denominator add or subtract as usual
143
1 -000

9. =16*19
304
132
272
102

10. =5*11
NO
729
55
729

11. =4*17
512
68
112
44

12. =13*19
42
247
10 -000 -000 -000
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)

13. 4/0 =
Arrainge #s from least to greatest and take the middle number or the average of the two middle #s
2
80
Undefined

14. =4*11
210
238
44
54

15. Does x^6 - x^2 = x^4?
4
NO
128
27

16. =6*15
90
112
255
Will = 1 - Won't

17. =12*15
84
238
56
180

18. Dividing Decimals
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
66
119
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller - stop when all the places are taken

19. SQRT 2 -401
49
90
40
81

20. =4*13
4
343
52
Invert (reciprocal) the second fraction and multiply

21. =4*9
9
36
234
126

22. =7^1
36
Line up the decimal points and proceed as usual
7
1.414213562

23. =3*10
25
30
224
247

24. =3*15
36
45
234
252

25. =6^1
1.732050808
52
Multiply the numerators and put the product over the product of the denominators
6

26. Problem that asks you to choose a # of items to fill specific spots - when each spot is filled from a different source?
27
Multiply the # of choices for each of the spots
5^(1/3)
64

27. =7^3
(b*h)/2
343
76
20

28. odd + odd =
90
81
Even
100 -000 -000

29. SQRT 1 -000 -000
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
10 -000 -000
1 -000
625

30. Exponents - Raising a power to a power
60
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)
Line up the decimal points and proceed as usual

31. =6*19
8
42
64
114

32. multiplying decimals
152
NO
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
225

33. =5*17
342
85
160
512

34. SQRT 49
126
96
380
7

35. SQRT 36
180
6
343
100

36. =8^3
512
9
11
1 -000

37. =7*16
270
112
1
96

38. =6*18
46 -656
16
108
48

39. =3^6
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)
729
99
112

40. =8*13
54
Invert (reciprocal) the second fraction and multiply
104
65

41. 216^(1/3)
24
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)
6
72

42. =5*14
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
70
3 -125
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)

43. =4*6
24
285
1.732050808
168

44. =8*11
256
25
80
88

45. 729^(1/3)
96
128
80
9

46. =4*18
128
72
8
45

47. =9*15
135
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)
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
Even

48. Dividing Fractions
Invert (reciprocal) the second fraction and multiply
77
Combinations don't care about the order of the problems
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller - stop when all the places are taken

49. =6*6
196
15
60
36

50. =2^2
64
0 (any fraction with 0 on top is 0)
100 -000
4