5 2 4 1 9 8 7 4 6 5 1 3 8 2 4 1 3 9 2 1 6 8 7 5 1 If all the prime Numbers are…

Explanation:

Step 1: Remove all prime numbers from the original series. The prime digits are 2, 3, 5, and 7.

Original series:

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

Step 2: Delete all primes (2, 3, 5, 7). Remaining numbers:

4 1 9 8 4 6 1 8 4 1 9 1 6 8 1

Step 3: Count the terms from the left to find the 12th element:

1. 1st: 4

2. 2nd: 1

3. 3rd: 9

4. 4th: 8

5. 5th: 4

6. 6th: 6

7. 7th: 1

8. 8th: 8

9. 9th: 4

10. 10th: 1

11. 11th: 9

12. 12th: 1

Therefore, the twelfth number from the left after deleting primes is 1.