A shopkeeper purchased 415 kg. of price at Rs. 25 per kg. He sold 225 kg. of rice at Rs. 28 per kg. At what approximately price per kg. should he sell the remaining rice in order to gain 20%?

A vessel has 20 litres of a solution of milk and water,having 90 per cent milk. How many litres of solution must be withdrawn from the vessel and replaced with water so that the vessel would have 80 per cent milk?

A camp has provisions to last for 6 days for 224 cadets. How many cadets must be sent away for the provisions to last for 7 days?

One litre of water was mixed to 3 litres of sugar solutions containing 4% of sugar. What is the percentage of sugar in the solution?

How is my father’s wife’s grandfather’s only child’s sons is related to me?

The cost of 16 packets of salt, each weighing 900 grams is Rs. 28. What will be the cost of 27 packets, if each packet weighs 1kg?

In how many different ways can the letters of word ‘BIOLOGY’ be arranged?

A car owner buys petrol at Rs 7.50, Rs. 8 and Rs. 8.50 per litre for three successive years. What approximately is the average cost per litre of petrol if he spends Rs. 4000 each year?

In a mixture of 60 litres, the ratio of milk and water is 2 : 1. If the ratio is to be 1 : 2, then the quantity of water to be further added is:

A shopkeeper purchases 10 kg of rice at 600 and sells at a loss as much the selling price of 2 kg of rice. Find the sale rate of rice/kg.