10 3/4 + 2 3/5 - 5 1/10 = ?

There are 30 students in a class. One student weighing 25 kg goes away and a new student joints the class. If the average weight is then increased by 200 grams, what is the weight of new student

The cost of a machine is estimated to be incresing at the ratio of 10% every year. If it costs Rs. 12000 now, what will be the estimated value after 3 years

The ratio of ages of Anil and Ashima is 3:5. The sum of their ages is 48 years. What is the age of Ashima

A shopkeeper sold some articles @ 35 per article and earned a profit of 40%. At what price each article should have been sold so that 60% profit was earned

By selling a book for 270, 20% profit was earned. What is the cost price of the book