Question

By selling a watch for Rs.1505, a man gains 1/6 of its cost price. Find the cost price of the watch.

Answer 1

let the CP be x
gain =1/6×x=x/6
Gain = SP-CP
x/6=1505-x
x/6+x=1505
7x/6=1505
7x=1505×6
x=1505×6/7
x=215×6
x=1290
CP=RS 1290

Answer 2

let the CP be x
gain. SP-CP
x/6 1505-x
x/6plus x. 1505
7x/6. 1505
7x. 1505 into 6
x. 1505 into 6/7
x. 215 into 6
x. 1290

CP. Rs 1290
is the answer