2023 IOQM/Problem 11
Problem
A positive integer haas the property that is expressible in the form , where n is an integer. Find the maximum value of .
Solution
. Now we try to complete the square, multiplying by and won't complete the square but on multiplication with we get or .
- : and and , .
- : and and ,.
- : and and , .
- : and and , .
Other cases in which the value of and interchange, the values of m and n will not change in those cases. Thus the maximum value of .
~Lakshya Pamecha and Parveen Sir