# Logical Reasoning - Number Series

### Exercise :: Number Series - Type 2

Look carefully for the pattern, and then choose which pair of numbers comes next.
1.

28 25 5 21 18 5 14

 A. 11 5 B. 10 7 C. 11 8 D. 5 10 E. 10 5

Explanation:

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.

2.

8 11 21 15 18 21 22

 A. 25 18 B. 25 21 C. 25 29 D. 24 21 E. 22 26

Explanation:

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.

3.

9 16 23 30 37 44 51

 A. 59 66 B. 56 62 C. 58 66 D. 58 65 E. 54 61

Explanation:

Here is a simple addition series, which begins with 9 and adds 7.

4.

2 8 14 20 26 32 38

 A. 2 46 B. 44 50 C. 42 48 D. 40 42 E. 32 26

Explanation:

This is a simple addition series, which begins with 2 and adds 6.

5.

9 11 33 13 15 33 17

 A. 19 33 B. 33 35 C. 33 19 D. 15 33 E. 19 21