Finding Squares for Numbers - Simple and Quick Technique

Squaring single digit numbers in your head is not that difficult if you know the multiplication tables. Squaring large numbers is not so easy. Continue reading this article for an easy method.

Inside a square plot, a circular garden is developed which exactly fits in the square plot and the diameter of the garden is equal to the side of the square plot which is 28 metres. What is the area of the space left out in the square plot after developing the garden (In Metre square)?

Mr. X invested a certain amount in Debt and Equity funds in the ratio of 4:5. At the end of one year, he earned a total dividend of 30% on his investment. After one year, he reinvested the amount including the dividend in the ratio 6:7 in Debt and Equity funds. If the amount reinvested in Equity Funds was Rs. 94500, what was the original amount invested in Equity Funds?

Two pipes A and B separately fill a cistern in 7.5 minutes and 5 minutes respectively and third pipe C can empty 14 litres per minute. If all the pipes are opened when the cistern is full , it is emptied in one hour. How many litres does the cistern hold?

The difference between Compound interest and Simple interest on a sum for three years when the rate of interest is 15% p.a is Rs. 720. What is the Principal amount?

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