Test your basic knowledge |

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. =8*17
52
136
323
24

2. =6*18
280
40
108
120

3. =15*15
117
18
2
225

4. multiplying decimals
100
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
Itself
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

5. =9*9
180
81
50
45

6. =11*15
104
10 -000 -000
165
15

7. =9^5
59 -049
Multiply both fractions to get a common denominator add or subtract as usual
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller - stop when all the places are taken
30

8. =16*16
204
256
9
100 -000

9. =3*6
Even
342
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
18

10. =4^1
x:x^(1/3):2x
4
50
136

11. =10^8
117
100 -000 -000
36
2

12. even + odd =
36
Odd
112
128

13. =6*6
8
3
3
36

14. How do you find the median of a set of numbers?
121
Arrainge #s from least to greatest and take the middle number or the average of the two middle #s
1 -000
6

15. Probability that A or B will happen?
24
9
99
A+B (Add both probabilities)

16. =8^1
It gets smaller
8
289
Pr^2

17. =2^9
Multiply both fractions to get a common denominator add or subtract as usual
80
32
512

18. =6*19
114
4
Pick the # that occurs most frequently
128

19. =6*10
100
135
60
75

20. SQRT 100 -000 -000
10 -000
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller - stop when all the places are taken
10
225

21. =6^1
380
x:x^(1/3):2x
32
6

22. =8*12
It becomes positive
96
198
16

23. =3*16
168
48
5
140

24. =8*13
100
66
104
80

25. =12*13
156
85
144
25

26. Probability that A and B will both happen?
20
A*B (Multiply both probabilities)
95
8

27. How do you find the slope of a line?
285
143
Difference in the y-coordinates over the difference in the x coodinates
4 -096

28. =15*19
15
340
7 -776
285

29. =9^4
10 -000 -000
6 -561
Undefined
208

30. Area of a triangle?
(b*h)/2
1.414213562
48
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

31. =5*13
24
65
Odd
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)

32. =14*17
Line up the decimal points and proceed as usual
238
56
Even

33. =5*9
1 -024
45
121
44

34. =2^2
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
4
49
1.732050808

35. Another way to write cube root 5
4
5^(1/3)
30
6

36. 30:60:90 Right Triangle (Lenghts)
1
4 -096
x:x^(1/3):2x
NO

37. =9^2
Subtract the smallest number from the greatest number
44
81
252

38. =8^3
152
512
Even
46 -656

39. =11*12
A*B (Multiply both probabilities)
36
132
1 -000

40. =13*15
10
32
195
32

41. =6^5
60
10 -000
125
7 -776

42. =5*10
50
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
105
Undefined

43. =7^3
2pr
306
512
343

44. =7*19
133
99
77
Rate * Time = Distance (Hint: Draw a chart)

45. =8*8
112
64
90
1 -000

46. =9^3
Multiply both fractions to get a common denominator add or subtract as usual
5
16
729

47. =5*14
70
25
7 -776
9

48. 27^(1/3)
70
3
64
247

49. Area of a circle?
Even
Pr^2
380
220

50. =14*19
266
220
Will = 1 - Won't
102