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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. =3*13
128
96
45
39

2. =7*18
126
7
100 -000
625

3. =7*7
46 -656
28
Won't = 1 - Will
49

4. =4^2
16
32
45
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller

5. =12*18
40
6
216
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. =1^3
Invert (reciprocal) the second fraction and multiply
1
625
240

7. Order of operations
68
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)
5
100

8. =6*17
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
36
102
512

9. SQRT 36
252
3
280
6

10. =8*8
64
224
255
228

11. =7*12
x:x^(1/3):2x
84
5
238

12. =3*20
27
60
16
5

13. =5*15
75
216
153
Multiply both fractions to get a common denominator add or subtract as usual

14. =16*16
256
182
1
27

15. Probability that A or B will happen?
32
72
A+B (Add both probabilities)
Undefined

16. Combinations: single source - order doesn't matter
6
104
260
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)

17. =9*9
625
7 -776
81
75

18. =20^2
400
196
343
Pick the # that occurs most frequently

19. =14*19
48
266
55
7

20. =5^5
1 -000
105
5^(1/3)
3 -125

21. =7^3
343
7
1 -000 -000
60

22. =9^3
729
195
9
42

23. =9^5
11
59 -049
224
285

24. =8*13
100
4
104
It becomes positive

25. SQRT 10 -000 -000 -000
11
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
100 -000
108

26. =11*19
380
1 -000
400
209

27. =4^4
10
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
256
238

28. =16*19
323
304
270
27

29. =7*13
221
91
7 -776
60

30. SQRT 1 -024
32
27
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)
3 -125

31. How do you find the slope of a line?
NO
Difference in the y-coordinates over the difference in the x coodinates
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
100

32. =9*16
Multiply the # of choices for each of the spots
144
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
216

33. =10^4
9
70
2
10 -000

34. =18*20
360
It gets smaller
198
56

35. =9*19
44
84
171
8

36. Exponents - Multiplying numbers with same base
323
Add their exponents (6^2 *6^3 = 6^5)
99
100 -000 -000

37. =11^2
10 -000 -000
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)
168
121

38. =6*18
288
27
108
10

39. =16*17
187
340
272
Arrainge #s from least to greatest and take the middle number or the average of the two middle #s

40. Distance Formula?
2
1 -024
Rate * Time = Distance (Hint: Draw a chart)
44

41. =8*12
51
100 -000
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)
96

42. =10^9
96
1 -000 -000 -000
187
90

43. =4*6
25
24
51
10 -000 -000

44. =3*6
100
18
9
120

45. SQRT 81
9
400
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
59 -049

46. SQRT 169
13
70
28
112

47. =5^4
625
81
0 (any fraction with 0 on top is 0)
Multiply the numerators and put the product over the product of the denominators

48. =4*20
70
80
81
15

49. =15*19
3
285
65
Line up the decimal points and proceed as usual

50. multiplying decimals
1 -000
198
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
100 -000