कुछ क्रिकेट गेंदे ₹900 में खरीदी गईं। यदि प्रत्येक गेंद ₹30 सस्ती होती तो उसी राशि में 10 और गेंदे खरीदी जा सकती थीं। खरीदी गई गेंदों की संख्या ज्ञात कीजिए (केवल पूर्णांक भाग पर विचार करें)।

A merchant raised the price of his products by 32%. What percentage discount (rounded off to one decimal place) should he give so as to sell the products on a no profit, no loss basis?

A shopkeeper offers the following two schemes: I. Two successive discounts of 30% and 45%. II. Buy 4, get 5 free. The single percentage discount (rounded off to two decimal places) from each scheme, respectively, is: