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Three years earlier the father was 7 times as old as his son. Three years hence the father’s age would be four times that of his son. What are the present ages of the father and son?

The age of the father 3 years ago was 7 times the age of his son. At present the father’s age is five times that of his son. What are the present ages of the father and son?

A Raghu borrowed 50000 from two money lenders . For the first loan, he paid 28% pa as simple interest and for the second loan he paid 24% pa. If total interest he paid at the end of the year be 12560, how much amount did he borrow from each lender ?

Ravi borrows a sum of Rs.3000 at the beginning of a year. After four months Rs.4200 more is borrowed at a rate of interest double the previous one. At the end of one year, the sum of interest on both the loans is Rs.832. What is the first rate of interest per anum?

Three types of pulses are mixed together. Their volumes are in a proportion to 5, 4 and 3 respectively and the weights of equal volumes are in proportion to 6, 5 and 4 respectively. What is the weight of the pulse of first type if the weight of the mixture is 248 kg?

P, Q and R invested Rs 10000, Rs 12000 and Rs 1300 in a business. After the end of 4 months all of them withdrew Rs 1000. After a total of 8 months from the start of business all of them added Rs 1000 in their investments. Find the ratio of their shares in total profit at the end of a year.

In an examination it is required to get 900 marks of the aggregate marks to pass. One of the students got 43% marks and he was declared failed by 40 marks. Find the maximum aggregate marks of the examination.