A women sells to the first customer half her stock of apples, to the second customer she sells half her remaining stock and so on to the third customer. She now has 15 apples left. How many apples did she have initially?

A woman sells to the first customer half her stock of apples and half an apple, to the second customer half an apple and half of her remaining stock and so also to a third and to a fourth customer. She finds that she has now 15 apples left. How many apples had she at first?

From a number of apples, a man sells half the number of existing apples plus 1 to the first customer, sells 1/3r d of the remaining apples plus 1 to the second customer and 1/5t h of the remaining apples plus 1 to the third customer. He then finds that he has 3 apples left. How many apples did he have originally? (a) 15 (b) 18 (c) 20 (d) 25

From a number of apples, a man sells half the number of existing apples plus 1 to the first customer, 1/3 rd of the remaining apples plus 1 to the second customer and 1/5 th of the remaining apples plus 1 to the third customer. He then finds that he has 3 apples left. If number of apples the man sold to the first customer, second customer and third customer are P,Q and R respectively, then find the value of: ((P+Q)^3 + (P + R)^2)/(Q +R+ 2)

A trader purchased 20 articles.He sold some of them to a customer at a gain of 10% and the remaining to another customer at a gain of 20%.If he gains 15% on the whole, then how many articles did he sell to the first customer?