Quantitative Aptitude - Arithmetic Ability Questions

What is the simplified value of (cotA + tan B)/(cot B + tan A)?

A vendor buys 6 bananas for Rs 25 and sells them at 3 for Rs 20. What is his profit percentage?

On selling 56 chairs, Mohan earns profit equal to the selling price of 6 chairs. What is the profit percentage?

The ratio of present ages of Rambha and Sarvesh is 8:5. After 7 years the ratio of their ages will be 5:4. What is Rambha's present age?

A water tank is 2/5 th full. Inlet A can fill the tank in 12 minutes while an outlet pipe B can empty it in 6minutes. If both the pipes are open, how long will it take to empty or fill the tank completely?

The rate of working of A and B are in the ratio of 2:3. The number of days taken by them to finish the work is in the ratio:

Arun and Amit can do a piece of work in 9 days and 12 days respectively. If they work for alternate days and Amit starts the work first, then in how many days 35/36 parts of whole work will be completed?

Average of 14 numbers is 32. If the average of last 5 numbers is 26, then what is the average of the remaining numbers?