A shop sells one chocolate at Rs. 1 each, Yo can get one chocolate free by returning three wrappers. if you have Rs. 15, how many chocolates can you get in total:
A man loses Rs. 20 by selling a toy for Rs. 3 Per piece and gains Rs. 30 by selling the same piece at Rs. 3.25 per piece. The number of pieces sold by the main is.......