Home > Practice > Verbal Reasoning > Series Completion > Miscellaneous
41. 2, 4, 6, 8, 10, ... What number should come next?
Solution:
This is a simple addition series. Each number increases by 2.
42. 201, 202, 204, 207, ... What number should come next?
Solution:
In this addition series, 1 is added to the first number; 2 is added to the second number; 3 is added to the third number; 4 is added to the fourth number; and go on.
43. 544, 509, 474, 439, ... What number should come next?
Solution:
This is a simple subtraction series. Each number is 35 less than the previous number.
44. 80, 10, 70, 15, 60, ... What number should come next?
Solution:
This is an alternating addition and subtraction series. In the first pattern, 10 is subtracted from each number to arrive at the next. In the second, 5 is added to each number to arrive at the next.
45. 2, 6, 18, 54, ... What number should come next?
Solution:
This is a simple multiplication series. Each number is 3 times more than the previous number.
46. 5.2, 4.8, 4.4, 4, ... What number should come next?
Solution:
In this simple subtraction series, each number decreases by 0.4.
47. 8, 6, 9, 23, 87 , ... What number should come next?
6 x 2 - 3 = 9
9 x 3 - 4 = 23
23 x 4 - 5 = 87
87 x 5 - 6 = 429 ...
Solution:
8 x 1 - 2 = 66 x 2 - 3 = 9
9 x 3 - 4 = 23
23 x 4 - 5 = 87
87 x 5 - 6 = 429 ...
48. 28, 25, 5, 21, 18, 5, 14, ... choose which pair of numbers comes next?
Solution:
This is an alternating subtraction series with the interpolation of a random number, 5, as every third number. In the subtraction series, 3 is subtracted, then 4, then 3, and so on.
49. 8, 11, 21, 15, 18, 21, 22, ... choose which pair of numbers comes next?
Solution:
This is an alternating addition series, with a random number, 21, interpolated as every third number. The addition series alternates between adding 3 and adding 4. The number 21 appears after each number arrived at by adding 3.
50. 9, 16, 23, 30, 37, 44, 51, ... choose which pair of numbers comes next?
Solution:
Here is a simple addition series, which begins with 9 and adds 7.