A person has some coins of ₹10, ₹5, and ₹2 denominations. The ratio of the products of the numbers of ₹10 and ₹5 coins, the numbers of ₹5 and ₹2 coins, and the numbers of ₹2 and ₹10 coins is 3: 4: 2 respectively. What could be the minimum amount of money this person has? 

Ram started a business with a sum of Rs 600. After 3 months Shyam and after 6 months Mohan also become partners. If the profit at the end of the year was divided in the ratio of 4: 5: 3, then how much was Shyam's capital more than Mohan's capital.

In what ratio must a mixture of 30 % alcohol strength be mixed with that of 50 % alcohol strength so as to get a mixture of 45 % alcohol strength? 

The mean of 14 observations is 11. One more observation is included and the new mean becomes 12. The  observation is

A sum of money amounts to 5,200 in 5 years and to 5,680 in 7 years at simple interest. The rate of interest per annum is-

The cost price of an article is Rs. 800. After allowing a discount of 10 %, a gain of 12.5 % is made. Then the marked price of the article is 

A wholesaler sold a water purifier at a loss of 40%. If the selling price has been increased by Its. 125, then wholesaler will get the profit of 10%. What was the cost price of the purifier?