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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. =13*14
182
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
10
4

2. =13*18
32
234
25
324

3. Basic probability formula?
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
143
Number of outcomes you want/total number of possible outcomes
7 -776

4. Adding or subtracting fractions with different denominators
320
343
Multiply both fractions to get a common denominator add or subtract as usual
54

5. Any number to the first power is?
80
64
Itself
256

6. =15^2
45
8
225
400

7. =4*5
Multiply the numerators and put the product over the product of the denominators
Itself
20
4

8. When is a number divisible by 4?

9. SQRT 1 -296
7 -776
It gets smaller
8
36

10. Right Isosceles triangle (lengths)?
80
Side - Side - Side^2
256
7 -776

11. =3*10
72
216
187
30

12. =2^8
256
10 -000 -000 -000
9
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. =9*20
36
1 -000 -000
180
32

14. =7*20
180
35
7 -776
140

15. If you raise a negative number to an even power - what happens to the number?
7
80
It gets smaller
It becomes positive

16. Area of a circle?
35
Difference in the y-coordinates over the difference in the x coodinates
Pr^2
1 -296

17. =6^3
216
81
48
260

18. Odds that something doesn't happen?

19. =17*19
323
270
210
120

20. =2^10
100
1 -024
117
64

21. =3*9
27
50
25
70

22. =5*17
60
Rate * Time = Distance (Hint: Draw a chart)
85
Move the decimal to the right on both numbers until there is nothing to the right of the decimal

23. =6^3
400
90
0 (any fraction with 0 on top is 0)
216

24. =7*9
8
171
88
63

25. multiplying decimals
255
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
112
30

26. Permutations: single source - order matters
42
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)
42

27. =4*18
75
76
2 -401
72

28. =13*17
30
221
44
288

29. =15*20
80
128
300
304

30. =4*17
68
304
10 -000 -000
300

31. =3*8
24
32
84
60

32. =15*15
225
8
6
78

33. =8^3
343
168
512
30

34. Probability that A and B will both happen?
625
343
36
A*B (Multiply both probabilities)

35. =16*18
102
288
210
10 -000

36. 0/1 =
Rate * Time = Distance (Hint: Draw a chart)
0 (any fraction with 0 on top is 0)
90
3:4:5 -- 5:12:13 -- 7:24:25

37. =7^1
9
280
247
7

38. =6*17
102
54
625
210

39. =8^2
64
272
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
4

40. =4*6
729
2pr
180
24

41. Problem that asks you to choose a # of items to fill specific spots - when each spot is filled from a different source?
361
16
It gets smaller
Multiply the # of choices for each of the spots

42. SQRT 9
3
Even
289
Subtract the smallest number from the greatest number

43. =4*19
76
247
198
33

44. =8^4
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
45
4 -096
1 -000 -000

45. =6^5
2
36
A+B (Add both probabilities)
7 -776

46. SQRT 121
2
154
10
11

47. =5*18
90
260
Base * Height
3 -125

48. 125^(1/3)
256
5
Multiply the numerators and put the product over the product of the denominators
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)

49. =2^3
108
128
221
8

50. =5*20
100
729
247
72