04-PBF 9 Abacus Leave a Comment / By Naresh / June 28, 2025 Welcome to your 04-PBF 9 Abacus 1. 1 + 2 + 9 2. 8 - 1 + 9 3. 2 + 9 + 2 4. 5 + 4 + 9 5. 3 + 9 + 2 6. 3 + 6 + 9 7. 1 + 9 + 1 8. 4 + 9 + 6 9. 8 - 7 + 9 10. 4 + 5 + 9 11. 8 + 9 + 1 12. 1 + 3 + 9 13. 2 + 7 + 9 14. 3 + 9 + 1 15. 2 + 9 + 7 1 out of 1