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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. odd x odd =
Odd
20
Add or subtract the numbers on top and keep the same denominator
169

2. Any number to the first power is?
85
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
Itself
80

3. =3*20
2
162
60
55

4. 216^(1/3)
1
2
512
6

5. =5*9
45
9
49
Add or subtract the numbers on top and keep the same denominator

6. =5*17
36
84
85
182

7. how do you find the range of a set of numbers?
304
Subtract the smallest number from the greatest number
342
256

8. =5*7
It gets smaller
35
36
91

9. =15*17
256
255
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)
A*B (Multiply both probabilities)

10. Dividing Fractions
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)
Invert (reciprocal) the second fraction and multiply
Side - Side - Side^2
It gets smaller

11. =4^5
100 -000
198
119
1 -024

12. When is a number divisible by 6?
0 (any fraction with 0 on top is 0)
81
176
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)

13. =8^1
256
Arrainge #s from least to greatest and take the middle number or the average of the two middle #s
64
8

14. =6^4
260
225
135
1 -296

15. =19*19
361
224
252
280

16. What is the difference between a permutation or a combination?

17. SQRT 81
10 -000 -000 -000
1 -000 -000
3 -125
9

18. Exponents - Multiplying numbers with same base
56
266
Add their exponents (6^2 *6^3 = 6^5)
35

19. =5^4
3
68
625
304

20. Key to percent increase/decrease
238
240
2
Amount of increase/original amount = x/100 (Then cross multiply to find x)

21. Odds that at least one thing will happen?

22. Area of a circle?
51
198
Pr^2
Difference in the y-coordinates over the difference in the x coodinates

23. =3*4
152
12
1
176

24. =11*18
66
512
Add or subtract the numbers on top and keep the same denominator
198

25. When is a number divisible by 3?
306
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
1 -000
64

26. =12*14
1 -024
100 -000 -000
168
196

27. =9*17
25
60
153
228

28. How do you find the slope of a line?
55
Even
Difference in the y-coordinates over the difference in the x coodinates
1 -000 -000 -000

29. Area of a parallelogram?
228
2
51
Base * Height

30. =3*10
108
30
55
1 -024

31. Dividing Decimals
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
49
Even
Even

32. =3^5
243
85
289
36

33. even + odd =
Base * Height
57
90
Odd

34. Adding and Subtracting Decimals
Line up the decimal points and proceed as usual
36
6 -561
It gets smaller

35. =9*20
180
4
105
171

36. =3*19
57
96
4
208

37. When is a number divisible by 6?
96
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)
5
24

38. SQRT 100
91
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
10
90

39. =11*11
121
57
45
112

40. =5*16
96
18
42
80

41. =15*16
100
240
7
9

42. =6*7
25
154
42
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)

43. Equation for a line?
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
210
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)
256

44. =4^4
48
256
10
247

45. 30:60:90 Right Triangle (Lenghts)
x:x^(1/3):2x
16
A*B (Multiply both probabilities)
4

46. =7*20
Even
Pr^2
140
105

47. =17*19
125
323
32
117

48. =9*19
100
8
304
171

49. =7^3
216
343
100
49

50. =6^2
36
100
224
Rate * Time = Distance (Hint: Draw a chart)