By selling a radio for Rs. 240, I lose 20%. What percent shall I gain by selling it for Rs.320 ?

By selling a radio for Rs. 950, a man loses 5%. What per cent shall he gain by selling it for Rs,1040 ?

By selling a tape-recorder for Rs. 760, I lose 5%. What percent shall I gain by selling it for Rs. 1000 ?

Ravish lost 20% by selling a radio set for Rs. 3072. What percent will he gain by selling it for Rs. 4080?

Lavanya lost 20% by selling a mobile for Rs.3072. What per cent will she gain by it for Rs.4080?

Mayank lost 20% by selling a bicycle for 1536 What percent shall he gain or lose by selling it for 2000?

By selling an A.C for Rs 18000, I loose 20%. What did I pay for it?