Question

by selling a watch for 1505 a man gains 1 upon 6 of its cost price find the cost price of the watch

Answer 1

Let a CP be x
then profit= 1x/6
SP= 1505
SP- CP= P
1505 - x= 1x/6
1505= 1x/6 +x
1505=7x/6
1505 ×6/7= x
215×6 =x
1290=x