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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*15
40
36
45
9

2. 8^(1/3)
57
112
240
2

3. =12*12
45
48
216
144

4. If you raise a positive fraction that is less than 1 to a power - what happens to the fraction?
121
NO
90
It gets smaller

5. =7^3
343
225
117
7

6. =11*15
165
162
18
Move the decimal to the right on both numbers until there is nothing to the right of the decimal

7. =5*19
4
60
95
256

8. =2^3
84
2
8
65

9. =10^10
60
10 -000 -000 -000
256
76

10. =5*13
65
3
121
32

11. What happens if you multiply or divide both sides of an inequality by a negative number?
182
The direction of the inequality symbol changes
260
153

12. Combinations: single source - order doesn't matter
98
Odd
234
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)

13. SQRT 4 -096
216
64
1.732050808
(x-y)^2

14. SQRT 3
Side - Side - Side^2
12
256
1.732050808

15. =16*16
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
289
144
256

16. =9*10
1 -000
90
1
114

17. even x even =
40
Even
4
209

18. =4*4
256
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
10
16

19. =9^3
380
729
132
9

20. =11^2
81
121
70
6

21. =10^2
6
252
625
100

22. =7^1
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
7
100 -000
60

23. =3*11
36
220
729
33

24. =12*14
168
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller
20
90

25. SQRT 81
9
28
15
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)

26. 27^(1/3)
4
6
100 -000 -000
3

27. =8*13
8
255
104
40

28. =9*9
81
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
54
3

29. =15*20
Permutations ask for 'arraingements' Combinations ask for 'Groups'
90
8
300

30. =4*8
65
32
400
8

31. Right Isosceles triangle (lengths)?
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
Side - Side - Side^2
30
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)

32. =11*18
114
18
90
198

33. =7^2
49
168
54
15

34. =11*11
112
343
4 -096
121

35. even + even =
Even
x:x^(1/3):2x
10 -000 -000
90

36. =18*18
Won't = 1 - Will
324
A*B (Multiply both probabilities)
10 -000 -000

37. =9*15
112
The direction of the inequality symbol changes
135
90

38. Adding or subtracting fractions with the same denominator
Add or subtract the numbers on top and keep the same denominator
100 -000
66
10 -000 -000

39. =11*20
324
A*B (Multiply both probabilities)
Multiply the # of choices for each of the spots
220

40. =10^1
48
10
4
15

41. =11*14
The direction of the inequality symbol changes
154
Multiply both fractions to get a common denominator add or subtract as usual
25

42. =7*16
112
40
49
80

43. =5*8
182
132
40
20

44. =4*19
Amount of increase/original amount = x/100 (Then cross multiply to find x)
Undefined
76
1 -000

45. =4*9
27
196
36
98

46. =7*12
5
Difference in the y-coordinates over the difference in the x coodinates
84
165

47. =17*17
54
49
289
300

48. =14*17
78
7 -776
A*B (Multiply both probabilities)
238

49. Adding and Subtracting Decimals
Line up the decimal points and proceed as usual
64
100 -000
180

50. =2^9
234
27
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
512