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. Factor x^2-2xy+y^2
729
10 -000 -000
(x-y)^2
49

2. SQRT 6 -561
1 -296
Even
81
1 -024

3. =20*20
225
400
25
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)

4. =5*19
28
2 -401
2
95

5. Problem that asks you to choose a # of items to fill specific spots - when each spot is filled from a different source?
90
49
60
Multiply the # of choices for each of the spots

6. =4*17
50
68
It becomes positive
729

7. =17*17
343
288
289
0 (any fraction with 0 on top is 0)

8. Key to percent increase/decrease
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
Amount of increase/original amount = x/100 (Then cross multiply to find x)
240
Odd

9. Does (x^2 + y^2 + z^2)/(x^2 + y^2) = z^2?
512
NO
135
Base * Height

10. =25^2
270
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)
56
625

11. SQRT 100
Even
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
10
48

12. =14*15
210
It gets smaller
64
Multiply the # of choices for each of the spots--but the number of choices keeps getting smaller

13. Adding or subtracting fractions with the same denominator
140
81
70
Add or subtract the numbers on top and keep the same denominator

14. =1^3
125
1
95
Multiply the # of choices for each of the spots

15. =8*15
6 -561
289
120
65

16. =12*18
1 -024
25
0 (any fraction with 0 on top is 0)
216

17. Adding or subtracting fractions with different denominators
32
2
Multiply both fractions to get a common denominator add or subtract as usual
266

18. Order of operations
PEMDAS (parenthesis - Exponents - Multiplication - Division - Addition - Subtraction)
625
108
95

19. =4^4
48
Multiply both fractions to get a common denominator add or subtract as usual
256
4

20. Odds that something doesn't happen?

21. =2^7
76
240
80
128

22. =7*7
49
0 (any fraction with 0 on top is 0)
112
A*B (Multiply both probabilities)

23. =11*20
2
220
32
306

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

25. SQRT 256
121
343
10 -000
16

26. Any number to the 0 power is?
323
27
One (1)
144

27. =12*14
8
104
168
10 -000 -000

28. =8^3
729
512
Invert (reciprocal) the second fraction and multiply
Pr^2

29. =8*18
144
Combinations don't care about the order of the problems
117
NO

30. Multiplying Fractions
6
280
Multiply the numerators and put the product over the product of the denominators
Amount of increase/original amount = x/100 (Then cross multiply to find x)

31. When is a number divisible by 3?
512
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)
If the number formed by it's last 2 digits is divisible by 4 (3 -028 is because 28 is divisible by 4)
4 -096

32. =4^3
121
32
64
210

33. If you raise a negative number to an odd power - what happens to the number?
168
It gets smaller
7
25

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

35. SQRT 4
143
36
It gets smaller
2

36. =3*3
9
(b*h)/2
It becomes positive
Number of outcomes you want/total number of possible outcomes

37. =16*17
121
6
72
272

38. =9*17
1.414213562
153
Even
Rate * Time = Distance (Hint: Draw a chart)

39. =2^3
20
8
76
48

40. SQRT 10 -000
9
A+B (Add both probabilities)
100
3

41. 0/1 =
225
6
0 (any fraction with 0 on top is 0)
5

42. Exponents - Dividing numbers with same base
256
Subtract the bottom exponents from the top exponents (3^6 / 3^2 = 3^4)
Difference in the y-coordinates over the difference in the x coodinates
66

43. 4/0 =
162
Undefined
90
126

44. =3*8
Multiply the exponents (4^3)^2 = 4^(3*2) = 4^6
24
1.414213562
The direction of the inequality symbol changes

45. =8^1
60
72
8
If the sum of its can be divided evenly by 3 (216 - is because 2+1+6 is divisible by 3)

46. =6*10
60
51
128
2

47. =6*8
99
48
32
228

48. =7*8
342
324
56
144

49. When is a number divisible by 6?
84
18
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)
25

50. =7*12
216
NO
0 (any fraction with 0 on top is 0)
84