765 chairs are to be arranged in columns in such a way
that the number of chairs in each column should be
equal to the number of columns. How many chairs will
be excluded to make the arrangement possible.
Mathematics has 25%formulas, 25%proofs and apply 25%thinking and 25%efforts.
In real life situations proofs are nothing but already existed stories(we know the solutions from all experienced people).
formulas are nothing but goals. we have so many goals b