In a factory, the production of cycles rose to 48,400 from 40,000 in 2 years. The rate of growth per annum is?

Two students appeared for an examination. One of them secured 9 marks more than the other and his marks were 56 % of the sum of their marks. The marks obtained by them are 

A retailer gets a discount of 40 % on the printed price of an article. The retailer sells it at the printed price. His gain percent is 

A number if required by 25% becomes 225. By what percent should be increased so that it becomes 375?

Find the greatest perfect square number of 5 digits.

Price of sugar rises by 20%. By how much percent should the consumption of sugar be reduced so that the expenditure does not change?

In a moter of 120 machine parts, 5 % parts were defective, in another motor of 80 machine parts, 10 % parts were defective. For the two motors considered together, the percentage of defective machine parts were 

A person spends 40% of his monthly income. The monthly income of the person is increased by 15% and his expenditure is decreased by 22%. What is the approximate percentage increase in his savings?