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Number series coding and Decoding and odd man out

Question : 18 of 51

Marks: +1, -0

6,11,21,36,56 ?

Solution:

Concept:

The differences between consecutive terms increase by 5 each time.

Explanation:

Step 1: Compute differences:

11 - 6 = 5

21 - 11 = 10

36 - 21 = 15

56 - 36 = 20

Step 2: The differences form an arithmetic sequence with common difference

5

Step 3: Next difference =

20 + 5 = 25

Step 4: Next term =

56 + 25 = 81

Answer:

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