Use Euclid's division lemma to show that the cube of any positive integer is of the form 9m , 9m 1 , or 9m 8

Entries in TALLY ERP 9 : 

1.) Salary paid to director ABC Rs.50000

2.) Travelling expenses paid by director of Rs. 10000 on behalf of company.

Determine the interval in which the following function is strictly increasing and decreasing : 

The sum of the measures of the external angles of any polygon is 360 degrees. Why?

please tell the answer