Find out the missing number in the following sequence.
1, 6, 6, 12, 11, ?, 16, 24
Show answer & explanation
Correct answer: B
Explanation
Given sequence: 1, 6, 6, 12, 11, ?, 16, 24 is 18
This sequence is a combination of two alternating series:
First Series (Odd positions): 1, 6, 11, 16
The rule is to add 5 to the previous number:
1+5 = 6
6 + 5 = 11
11 + 5 = 16
Second Series (Even positions): 6, 12, ?, 24
The rule is to add 6 to the previous number:
6 + 6 = 12
12 + 6 = 18
18 + 6 = 24
By following the pattern of the second series, the missing number is 18.
Hence, the correct answer is option (2).