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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. =15^2
187
221
81
225

2. =3*13
10 -000 -000 -000
39
It gets smaller
52

3. =3*9
140
243
33
27

4. What happens if you multiply or divide both sides of an inequality by a negative number?
24
The direction of the inequality symbol changes
Difference in the y-coordinates over the difference in the x coodinates
Amount of increase/original amount = x/100 (Then cross multiply to find x)

5. Basic probability formula?
0 (any fraction with 0 on top is 0)
171
Number of outcomes you want/total number of possible outcomes
8

6. =4^5
20
1 -024
133
70

7. =16*20
625
320
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
10

8. =5*20
100
256
133
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)

9. If you raise a negative number to an odd power - what happens to the number?
It gets smaller
121
117
27

10. =4*16
51
70
10 -000 -000 -000
64

11. =13*14
225
182
228
16

12. =4*8
3
Difference in the y-coordinates over the difference in the x coodinates
288
32

13. =7*8
400
56
156
Won't = 1 - Will

14. SQRT 2 -401
3:4:5 -- 5:12:13 -- 7:24:25
49
120
114

15. =3^2
10 -000 -000
9
240
280

16. Area of a triangle?
(b*h)/2
100 -000
260
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)

17. =8*18
6
144
238
It gets smaller

18. =8*17
228
136
400
28

19. Adding or subtracting fractions with different denominators
63
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)
Multiply both fractions to get a common denominator add or subtract as usual

20. Multiplying Fractions
Multiply the numerators and put the product over the product of the denominators
1 -000 -000
91
6

21. =7*19
10
133
NO
64

22. =18*18
324
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)
5

23. =2^5
125
3
32
304

24. even + odd =
Odd
198
Subtract the smallest number from the greatest number
260

25. =14*18
252
2
143
64

26. =3*4
140
216
12
Rate * Time = Distance (Hint: Draw a chart)

27. =14*14
135
Itself
196
10 -000

28. =13*20
143
512
260
60

29. =7^3
78
343
NO
Side - Side - Side^2

30. =4*10
7
240
36
40

31. 0/1 =
Even
126
0 (any fraction with 0 on top is 0)
100

32. =8*19
224
49
153
152

33. =5*19
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
95
76

34. Any number to the 0 power is?
64
One (1)
1 -000
132

35. =15*17
24
255
Will = 1 - Won't
132

36. =2^2
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)
Even
4
3

37. =3*11
55
33
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
76

38. SQRT 49
7
Number of outcomes you want/total number of possible outcomes
5
270

39. Area of a circle?
36
33
Pr^2
340

40. =4*11
729
44
144
380

41. Probability that A or B will happen?
A+B (Add both probabilities)
224
10 -000 -000
91

42. =4*4
16
76
Difference in the y-coordinates over the difference in the x coodinates
400

43. 0/1 =
2
10
4
0 (any fraction with 0 on top is 0)

44. Odds that at least one thing will happen?

45. SQRT 400
70
20
39
57

46. =3*15
240
45
6
44

47. =2^7
128
15
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
52

48. =4*17
132
68
400
247

49. =7*12
136
84
361
It becomes positive

50. Dividing Fractions
7
100 -000 -000
104
Invert (reciprocal) the second fraction and multiply