Test your basic knowledge |

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. =12*15
625
180
50
7

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

3. =12*14
64
10 -000 -000 -000
168
Amount of increase/original amount = x/100 (Then cross multiply to find x)

4. =6*11
Even
15
66
240

5. =3*16
32
48
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
9

6. even x even =
400
57
140
Even

7. =8*15
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)
120
Won't = 1 - Will
5^(1/3)

8. even + odd =
136
Odd
24
8

9. =4*13
4
52
153
2pr

10. SQRT 625
25
182
64
x:x^(1/3):2x

11. =11*11
64
240
8
121

12. Combinations: single source - order doesn't matter
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)
81
Permutations ask for 'arraingements' Combinations ask for 'Groups'
Start with the number of permutations - that is the numerator(top). The Denominator is the number of combinations (eg 432*1)

13. =10^5
324
156
NO
100 -000

14. =3*9
27
255
224
42

15. 8^(1/3)
57
256
80
2

16. =12*19
216
10 -000 -000
42
228

17. When is a number divisible by 4?

18. =3^6
729
3 -125
64
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)

19. =15*20
25
1 -000
16
300

20. =7*7
72
40
Side - Side - Side^2
49

21. =16*16
36
3
238
256

22. Pythagorean Triples (lengths)?
4
8
3:4:5 -- 5:12:13 -- 7:24:25
7

23. =4^5
x:x^(1/3):2x
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
100
1 -024

24. SQRT 36
45
10 -000
6
40

25. =8*9
Subtract the smallest number from the greatest number
72
96
266

26. Another way to write cube root 5
5^(1/3)
9
57
Subtract the smallest number from the greatest number

27. =6*15
NO
60
90
4

28. =11^2
4 -096
9
216
121

29. SQRT 400
288
20
72
240

30. Exponents - Multiplying numbers with same base
8
625
It gets smaller
Add their exponents (6^2 *6^3 = 6^5)

31. =9*19
100 -000
55
171
270

32. SQRT 10 -000 -000 -000
100 -000
Number of outcomes you want/total number of possible outcomes
196
272

33. SQRT 169
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
13
100 -000
2 -401

34. =5*15
30
75
220
3

35. =2^8
256
90
70
114

36. =6^2
187
36
Pick the # that occurs most frequently
224

37. =5*10
(b*h)/2
50
304
Permutations ask for 'arraingements' Combinations ask for 'Groups'

38. If you raise a negative number to an even power - what happens to the number?
It becomes positive
48
24
Undefined

39. =8^2
343
64
300
4 -096

40. =25^2
126
306
625
15

41. =3*14
153
220
132
42

42. =4^3
220
64
156
59 -049

43. =6*18
108
3
132
128

44. =5*7
266
343
35
36

45. =19*20
216
56
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
380

46. =16*17
221
90
60
272

47. =14*16
224
100
Move the decimal to the right on both numbers until there is nothing to the right of the decimal
36

48. =9*16
10 -000
169
Add or subtract the numbers on top and keep the same denominator
144

49. =13*13
169
400
210
4 -096

50. =4*19
Even
76
51
85