Question

nitin sold hismobile at a profit of 5% if he had sold it for rupees 2565 less he would have incurred a loss of 4% find cost price of mobile

Answer 1

when he sell the mobile with 5% profit tha SP=105%
when he sold the mobile with 4% loss the SP =96%
the difference 9% given =2565
1%=285
cost price always 100%= 28500rs
is is basic and shortest method of solving these type of question without any formula...