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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. =10^2
100
The direction of the inequality symbol changes
216
49

2. multiplying decimals
125
49
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
729

3. How do you find the mode of a set of numbers?
Pick the # that occurs most frequently
60
64
126

4. =7^2
48
45
209
49

5. =10^6
153
46 -656
1 -000 -000
225

6. =5*14
70
Invert (reciprocal) the second fraction and multiply
13
A+B (Add both probabilities)

7. =6*19
9
96
114
266

8. =14*20
280
27
187
60

9. When is a number divisible by 4?

10. =6^3
112
216
50
9

11. =3^1
7 -776
196
57
3

12. =4*15
60
33
100 -000
57

13. =2^5
32
Multiply the numerators and put the product over the product of the denominators
NO
216

14. =8*8
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
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
56
64

15. =10^5
729
100 -000
625
33

16. =6^2
10 -000
27
36
90

17. =16*17
272
45
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
90

18. SQRT 2
729
1.414213562
135
13

19. =9*16
78
144
512
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)

20. 0/1 =
0 (any fraction with 0 on top is 0)
108
25
119

21. =17*19
3:4:5 -- 5:12:13 -- 7:24:25
119
323
209

22. =13*18
234
66
209
10 -000

23. Area of a parallelogram?
100
84
65
Base * Height

24. =7*9
114
10 -000 -000
4
63

25. =12*14
180
234
6
168

26. When is a number divisible by 3?
168
81
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
Even

27. =16*19
4
59 -049
304
135

28. =19*20
It gets smaller
380
512
104

29. =4*9
90
36
64
70

30. When is a number divisible by 6?
171
63
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)
289

31. =7*20
144
4
140
512

32. =6^4
8
1 -296
100 -000 -000
5

33. Adding or subtracting fractions with the same denominator
NO
Add or subtract the numbers on top and keep the same denominator
192
Even

34. =4*14
320
56
30
342

35. =7*7
64
49
243
132

36. =8^2
Permutations ask for 'arraingements' Combinations ask for 'Groups'
64
153
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)

37. =12*20
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)
256
266
240

38. how do you find the range of a set of numbers?
2
1 -000 -000 -000
Subtract the smallest number from the greatest number
221

39. =6*18
Amount of increase/original amount = x/100 (Then cross multiply to find x)
It gets smaller
108
Itself

40. Multiplying Fractions
Multiply the numerators and put the product over the product of the denominators
114
64
288

41. SQRT 1 -024
32
40
It gets smaller
220

42. Exponents - Multiplying numbers with same base
104
Add their exponents (6^2 *6^3 = 6^5)
8
70

43. =2^10
6
1 -024
2
59 -049

44. =8^4
3
4 -096
204
100

45. =6^5
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
7 -776
8
95

46. =8*20
280
5^(1/3)
100
160

47. 216^(1/3)
221
6
154
64

48. =4*13
52
125
70
108

49. =9*14
126
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
0 (any fraction with 0 on top is 0)
320

50. What happens if you multiply or divide both sides of an inequality by a negative number?
Won't = 1 - Will
The direction of the inequality symbol changes
8
44