Refer to the following number series(Left) 4 9 8 5 1 6 4 5 9 6 5 3 4 9 6 2 9 4 8 5 1 1 8 4 1 5 7 (Right)

Step 1: Identify odd numbers

Odd numbers are: 1, 3, 5, 7, 9

The series is:

$4, 9, 8, 5, 1, 6, 4, 5, 9, 6, 5, 3, 4, 9, 6, 2, 9, 4, 8, 5, 1, 1, 8, 4, 1, 5, 7$

Step 2: Check each odd number (except first and last)

We check each odd number to see if both neighbors are odd:

1. 9 → neighbors 4 (even), 8 (even) → NO

2. 5 → neighbors 8 (even), 1 (odd) → NO

3. 1 → neighbors 5 (odd), 6 (even) → NO

4. 5 → neighbors 4 (even), 9 (odd) → NO

5. 9 → neighbors 5 (odd), 6 (even) → NO

6. 5 → neighbors 6 (even), 3 (odd) → NO

7. 3 → neighbors 5 (odd), 4 (even) → NO

8. 9 → neighbors 4 (even), 6 (even) → NO

9. 9 → neighbors 2 (even), 4 (even) → NO

10. 5 → neighbors 8 (even), 1 (odd) → NO

11. 1 → neighbors 5 (odd), 1 (odd) → YES ✅

12. 1 → neighbors 1 (odd), 8 (even) → NO

13. 1 → neighbors 4 (even), 5 (odd) → NO

14. 5 → neighbors 1 (odd), 7 (odd) → YES ✅

Step 3: Count

Numbers satisfying the condition: 1 and 5 → total 2 numbers

Answer: 2