number series logical reasoning questions

6.

13 29 15 26 17 23 19
A.     21 23    B.     20 21
C.     20 17    D.     25 27
E.     22 20
Answer & Explanation

Answer: Option B

Explanation:

Here, there are two alternating patterns, with every other number following a different pattern. The first pattern begins with 13 and adds 2 to each number to arrive at the next; the alternating pattern begins with 29 and subtracts 3 each time.
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7.

14 14 26 26 38 38 50
A.     60 72    B.     50 62
C.     50 72    D.     62 62
E.     62 80
Answer & Explanation

Answer: Option B

Explanation:

In this simple addition with repetition series, each number in the series repeats itself, and then increases by 12 to arrive at the next number.
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8.

44 41 38 35 32 29 26
A.     24 21    B.     22 19
C.     23 19    D.     29 32
E.     23 20
Answer & Explanation

Answer: Option E

Explanation:

This is a simple subtraction series, in which 3 is subtracted from each number to arrive at the next.
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9.

34 30 26 22 18 14 10
A.     8 6    B.     6 4
C.     14 18    D.     6 2
E.     4 0
Answer & Explanation

Answer: Option D

Explanation:

This is a simple subtraction series, in which 4 is subtracted from each number to arrive at the next.
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10.

32 31 32 29 32 27 32
A.     25 32    B.     31 32
C.     29 32    D.     25 30
E.     29 30
Answer & Explanation

Answer: Option A

Explanation:

This is an alternating repetition series. The number 32 alternates with a series in which each number decreases by 2.

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