The cost of setting up the type of a magazine is Rs.1000. The cost of running the printing machine is Rs. 120 per 100 copies, the cost of paper, ink and so on is 60 paise per copy. The magazines are sold at Rs.2.75 each. 900 copies are printed, but only 784 copies are sold. What is the sum to be obtained from advertisements to give a profit of 10% on the cost?

A sum is divided between A and B in the ratio of 1 : 2. A purchased a car from his part, which depreciates 14 2/7 % per annum and B deposited his amount in a bank, which pays him 20% interest per annum compounded annually. By what percentage will the total sum of money increase after two years due to this investment pattern (approximately)?

Two cubes of bronze have their total weight equivalent to 60 kg. The first piece contains 10 kg of pure zinc and the second piece contains 8 kg of pure zinc. What is the percentage of zinc in the first piece of bronze if the second piece contains 15% more zinc than the first?

An ant moved for several seconds and covered 3 mm in the first second and 4 mm more in each successive second than in its predecessor. If the ant had covered 1 mm in the first second and 8 mm more in each successive second, then the difference between the path it would cover during the same time and the actual path would be more than 6 mm but less than 30 mm. Find the time for which the ant moved (in sec).

The number of natural numbers of two or more than two digits in which digits from left to right are in increasing order is:

The Bubna dam has four inlets. Through the first three inlets, the dam can be filled in 12 minutes; through the second, the third and the fourth inlet, it can be filled in 15 minutes; and through the first and the fourth inlet, in 20 minutes. How much time will it take for all the four inlets to fill up the dam?

Find the sum of all two-digit numbers that give a remainder of 3 when they are divided by 7

A train travels with a speed of 20 m/s in the first 10 minutes, goes 8.5 kms in the next 10 minutes, 11 kms in the next 10 minutes, 8.5 kms in the next 10 minutes and 6 kms in the next 10 minutes. What is the average speed of the train in kilometre per hour for the journey described?

Two solutions of 90% and 97% purity are mixed resulting in 21 litres of mixture of 94% purity. How much is the quantity of the first solution in the resulting mixture?