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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. =6^1
49
6
Odd
88

2. =4^1
16
27
4
272

3. How do you tell if it's a permutation or combination?

4. 8^(1/3)
2
Difference in the y-coordinates over the difference in the x coodinates
NO
144

5. =12*16
192
Amount of increase/original amount = x/100 (Then cross multiply to find x)
4
Even

6. =6^3
108
25
117
216

7. =7^1
9
32
24
7

8. =8*17
4 -096
182
216
136

9. =7*19
361
25
133
9

10. SQRT 400
Won't = 1 - Will
1.414213562
20
121

11. =4*12
48
56
7
238

12. Area of a circle?
Invert (reciprocal) the second fraction and multiply
36
208
Pr^2

13. =7*16
56
126
112
343

14. =5*17
16
85
10 -000 -000
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)

15. =9*20
180
10 -000 -000 -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
228

16. =6*16
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
96
100 -000
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)

17. =12*12
Difference in the y-coordinates over the difference in the x coodinates
144
15
182

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

19. 729^(1/3)
9
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
42
100

20. =14*20
280
6
6 -561
156

21. =9^3
729
Multiply the # of choices for each of the spots
Add or subtract the numbers on top and keep the same denominator
It gets smaller

22. =3*3
9
8
Pr^2
80

23. Any number to the first power is?
It gets smaller
3
Itself
Even

24. Basic probability formula?
1 -296
2
Number of outcomes you want/total number of possible outcomes
64

25. When is a number divisible by 3?
1 -000 -000
Pr^2
361
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)

26. =16*17
25
128
272
105

27. When is a number divisible by 6?
340
1.414213562
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)
80

28. =25^2
128
625
2 -401
216

29. If you raise a negative number to an odd power - what happens to the number?
256
4
133
It gets smaller

30. =4*15
9
2pr
81
60

31. Area of a triangle?
52
x:x^(1/3):2x
(b*h)/2
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)

32. =6*14
195
84
96
7

33. =2^5
32
NO
126
209

34. =8*10
Difference in the y-coordinates over the difference in the x coodinates
80
108
136

35. Permutations: single source - order matters BUT only for a selection
Side - Side - Side^2
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller - stop when all the places are taken
The direction of the inequality symbol changes
Even

36. Exponents - Multiplying numbers with same base
Add their exponents (6^2 *6^3 = 6^5)
342
46 -656
96

37. =6*7
42
(b*h)/2
121
Side - Side - Side^2

38. =3*8
24
28
66
40

39. When is a number divisible by 3?
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
36
5
36

40. =8*19
Pr^2
10 -000 -000 -000
55
152

41. =5^3
A*B (Multiply both probabilities)
88
125
126

42. =9*13
4
117
85
198

43. =11*15
512
64
165
27

44. SQRT 10 -000
100
216
Won't = 1 - Will
176

45. =13*18
234
224
Undefined
9

46. =1^3
64
24
80
1

47. SQRT 36
104
9
6
10 -000 -000 -000

48. =10^1
65
7
10
187

49. =4^2
Line up the decimal points and proceed as usual
324
16
36

50. 30:60:90 Right Triangle (Lenghts)
33
x:x^(1/3):2x
Multiply the # of choices for each of the spots
90