The price of an article increases by 6.25% every year. If the difference between its price at the end of the second and the first year is Rs. 531.25, then what will be its price (in Rs) at the start of the first year?
A marks her goods 25% above the cost price. She sells 25% of the goods at the marked price, 60% at 25% discount and the remaining at 10% discount. What is her overall gain or loss percent?
If 'A' is 7 times as efficient as 'B', 'B' takes 32 days to complete the task, then find the number of days required to finish the whole work by 'A' and 'B' working together.