Question

how to tie 100 horses with 11 pillars with an odd number on each pillar

Answer 1

If the question is rigid by the requirement of odd number condition, then the solution is non-existant.

If the question can be altered a bit, then one can tie one of the horses to 2 pillars and get the result ultimately but it will be an act of animal cruelty and it is a punishable offence in India.