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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. =5^1
5
729
It becomes positive
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6

2. =8*12
(b*h)/2
81
96
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6

3. =3*8
306
Subtract the smallest number from the greatest number
77
24

4. =5*10
50
99
Number of outcomes you want/total number of possible outcomes
Side - Side - Side^2

5. Probability that A or B will happen?
95
16
A+B (Add both probabilities)
80

6. =9*14
126
55
6 -561
x:x^(1/3):2x

7. If you raise a positive fraction that is less than 1 to a power - what happens to the fraction?
30
It gets smaller
68
380

8. Multiplying Fractions
Multiply the numerators and put the product over the product of the denominators
24
72
95

9. How do you find the median of a set of numbers?
729
4
45
Arrainge #s from least to greatest and take the middle number or the average of the two middle #s

10. =3^3
40
360
27
104

11. =13*20
280
260
4
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6

12. =1^3
4
28
11
1

13. =4^3
72
160
64
3

14. =9^3
Number of outcomes you want/total number of possible outcomes
120
105
729

15. SQRT 10 -000 -000 -000
Subtract the smallest number from the greatest number
100 -000
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
24

16. Circumference of a circle?
81
13
3
2pr

17. =11*14
209
64
204
154

18. =8^3
512
180
45
Add or subtract the numbers on top and keep the same denominator

19. =19*19
361
104
10 -000
5

20. =11*16
90
176
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
4

21. =6^5
7 -776
27
25
132

22. SQRT 256
16
25
40
256

23. =2^5
266
32
224
64

24. even + odd =
234
One (1)
36
Odd

25. =14*20
625
64
238
280

26. =7^2
125
380
160
49

27. =3^5
225
27
Rate * Time = Distance (Hint: Draw a chart)
243

28. SQRT 64
98
95
8
Pick the # that occurs most frequently

29. =8*9
340
72
2
4

30. If you raise a negative number to an odd power - what happens to the number?
It gets smaller
A+B (Add both probabilities)
154
95

31. SQRT 169
13
49
238
7

32. =9^5
Subtract the smallest number from the greatest number
Odd
25
59 -049

33. SQRT 81
9
85
209
144

34. =15*16
240
48
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
221

35. =3*9
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)
27
Rate * Time = Distance (Hint: Draw a chart)
4

36. =5*17
NO
85
7 -776
(b*h)/2

37. SQRT 25
It gets smaller
Difference in the y-coordinates over the difference in the x coodinates
289
5

38. =5^2
78
25
176
46 -656

39. how do you find the range of a set of numbers?
Subtract the smallest number from the greatest number
NO
320
81

40. =5^4
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller - stop when all the places are taken
270
625
252

41. =3*16
343
48
228
216

42. SQRT 1 -000 -000
13
12
1 -000
105

43. =5*20
100
15
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)

44. =6*7
42
Multiply both fractions to get a common denominator add or subtract as usual
10
81

45. =10^9
1 -000 -000 -000
6
81
119

46. =7^3
(x-y)^2
2
15
343

47. Key to percent increase/decrease
Amount of increase/original amount = x/100 (Then cross multiply to find x)
72
11
5

48. =7*16
2
112
360
27

49. =7*17
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
125
7
119

50. Does x^2 + x^3 = x^5?
70
NO
625
42