Refer to the given series and answer the question that follows. (All numbers are single digit numbers only.) Counting to be done from left to right only.
(Left) 3 1 2 6 9 8 1 3 4 1 6 9 5 1 1 5 9 9 4 2 7 7 8 3 9 8 8 (Right)
How many such odd numbers are there, each of which is immediately preceded by an odd number and also immediately followed by an even number?
- AOption (a)
7
- BOption (b)
4
- COption (c)
6
- DOption (d)
5
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Correct answer
5
Why this answer is correct
Given Series:
(Left) 3 1 2 6 9 8 1 3 4 1 6 9 5 1 1 5 9 9 4 2 7 7 8 3 9 8 8 (Right)
Required Pattern:
Odd → Odd → Even
Checking the series:
(Left) 3 1 2 6 9 8 1 3 4 1 6 9 5 1 1 5 9 9 4 2 7 7 8 3 9 8 8 (Right)
Odd numbers satisfying the condition:
→ 1 in (3 1 2)
→ 3 in (1 3 4)
→ 9 in (9 9 4)
→ 7 in (7 7 8)
→ 9 in (3 9 8)
Therefore, there are 5 such odd numbers.
Hence, the correct answer is "Option 4".