Pratip started the business by investing some money. After some time, Sheela shared double by investing double the money. At the end of the year, the profit was distributed in such a way that 7 times the profit of Pratip was equal to 6 times the profit of Sheela, then after how many months did Sheela join the business.

17 articles were bought for ₹3910 and sold for ₹4590. How much was the approximate profit percentage per article?

The maximum number of students among whom 1001 pens and 910 pencils can be distributed in such a way that each student gets same number of pens and same number of pencils, is: 

Seema’s present age is four times her son’s present age and four seventh of her father’s present age. The average of the present age of all three of them is 32 years. What is the difference between the Seema’s son’s present age and Seem’s father’s present age?

Find the average of the following set of numbers 148, 88, 184, 166, 96, 122

If for a certain quantity of books, the publisher has to pay Rs. 30,600 as printing cost, then what will be the amount of royalty to be paid for these books?

Oranges are bought at 7 for Rs. 3. At what rate per hundred must they be sold to gain 33 % ?