A Serial Killer

What is the next number in the sequence : 1, 4, 5, 6 , 7, 9, 11 , …… 

See our previous ‘Puzzles of the Day’: 

Puzzle of the Day : 28
Puzzle of the Day : 27


  1. Two,Three,Eight,Ten have “T” in it so its not showing in the series.
    So the next number will be 100

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