11. Twenty years ago, Robert Axelrod used the prisoner's dilemma12. Over half the fleet was more than twenty years old . 13. He was twenty minutes from his tent , and began to make his way there . 14. Number of stanzas in in Narad Puran is twenty five thousand. 15. Between 1860 and 1880 some twenty more mills were established . 16. No mines were , however , opened in the next twenty years . 17. There are twenty four thousand verses in the “”Varahpuran“”. 18. Twenty percent of the posters we are receiving comes from schools.19. I was only twenty yards from the wall , and I still saw nothing . 20. It had stored one lakh twenty five thousand posts.
