OK , HERE IS THE THIRD ONE......................

 

In a finite sequence of real numbers the sum of any seven successive terms is 

 

negative, and the sum of any eleven successive terms is positive. Determine the

 

maximum number of terms in the sequence.

 

 

AWARD : 20 RATING POINTS

 

REQUEST - THIS POST IS NOT FOR PEOPLE WHO HAVE SOLVED THIS Q. BEFORE OR HAVE AN IDEA FROM WHERE TO GET THE SOLUTION ( BY SOME UNKNOWN REFERENCES  ..............  )