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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. =7^3
729
Odd
256
343

2. =3*3
100
160
4 -096
9

3. Combinations: single source - order doesn't matter
42
162
70
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)

4. =7*14
50
98
304
56

5. =2^4
16
98
76
1

6. =14*18
6 -561
180
252
88

7. =2^1
(b*h)/2
0 (any fraction with 0 on top is 0)
2
1 -000

8. =12*15
180
50
108
360

9. =10^2
91
Line up the decimal points and proceed as usual
(b*h)/2
100

10. Factor x^2-2xy+y^2
260
16
(x-y)^2
120

11. Another way to write cube root 5
225
4
5^(1/3)
55

12. multiplying decimals
27
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
98

13. =15*16
8
NO
240
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)

14. =10^9
55
10 -000
1 -000 -000 -000
56

15. =7*18
18
30
126
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)

16. 216^(1/3)
Even
20
6
54

17. =4^6
4 -096
5
25
8

18. =6*20
120
1 -000
32
64

19. =8*19
100 -000
Will = 1 - Won't
266
152

20. SQRT 4 -096
64
28
4
216

21. =4*9
36
Will = 1 - Won't
125
361

22. =3*6
44
119
72
18

23. =5*14
8
121
70
182

24. =6^3
59 -049
216
512
36

25. =3^3
208
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
27
36

26. =5^5
100 -000
91
256
3 -125

27. =8*13
3:4:5 -- 5:12:13 -- 7:24:25
104
625
180

28. =4*4
16
300
80
165

29. =17*19
16
625
360
323

30. Area of a parallelogram?
187
52
Base * Height
195

31. =17*18
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
Invert (reciprocal) the second fraction and multiply
306
1 -024

32. =4^1
512
100 -000
4
209

33. =13*15
195
54
One (1)
140

34. =5^1
5
243
90
176

35. odd + odd =
Even
12
0 (any fraction with 0 on top is 0)
361

36. =9^1
9
80
70
256

37. =3^5
243
15
306
Rate * Time = Distance (Hint: Draw a chart)

38. =10^10
729
Even
10 -000 -000 -000
100

39. SQRT 10 -000
240
100
125
1 -296

40. =2^2
4
343
33
285

41. even + even =
0 (any fraction with 0 on top is 0)
117
342
Even

42. =3*11
187
Line up the decimal points and proceed as usual
240
33

43. Exponents - Raising a power to a power
Itself
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
Even
60

44. =3*5
65
32
15
306

45. SQRT 121
11
1 -024
266
512

46. When is a number divisible by 6?
4
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)
104
NO

47. Any number to the negative power (y) is equal to?
84
2
64
The reciprocal of the same number to the positive power (y). (eg 3^-2 = 1/(3^2) = 1/9)

48. Dividing Fractions
25
Invert (reciprocal) the second fraction and multiply
20
300

49. =4*19
234
76
8
304

50. =16*18
180
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
220
288