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Question 68

Logical Reasoning Alphanumeric series Easy

Identify the sixth number in the series:6, 11, 21, 36, 56, ?

(A) 52

(B) 21

(C) 81

(D) 82

✓ Correct Answer: Option C Verified Solution

📘 Step-by-Step Solution & Detailed Explanation:

The series is 6, 11, 21, 36, 56, ?

Differences between consecutive terms:

11 - 6 = 5
21 - 11 = 10
36 - 21 = 15
56 - 36 = 20

The differences increase by 5 each time, so the next difference is 20 + 5 = 25.

Thus, the sixth number is 56 + 25 = 81.

Answer: (C) 81

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