The arithmetic mean of four distinct numbers is 90. If the greatest of the four numbers is 120, what is the maximum possible value of the range of the set of four numbers?

Rearrange the jumbled letters to make meaningful words and then select the one which is different.

A wholesaler sells books to a retailer at 10% profit. The retailer sells these books to customers at a profit of 8 %. If the customer pays ₹ 270 for a book. then find the cost of the book to the retailer.

A positive number exceed its positive square root by 30. Find the number.

Bleaching powder is produced by the action of chlorine on dry slaked lime. Which of the following is the appropriate equation for this?