$$\sqrt{x}÷ \sqrt{144} = 0.02, $$ then the value of x is 

If ' n ' be any natural number , then by which number ( n⁴-n ) is always divisible ? 

The selling price of the product was equal to 50% of its cost price. Two gradual discounts were offered on the product. If the first discount was 20%, then what was the second discount?

In the given figure if each of the outer circles have radii ‘R’, then the radius of the inner circle will be:

What will come in place of the question mark (?) in each of the following series?

15     ?    24    33     97    122     

If the ratio of speed of train, car and bus is 6:5:3 and bus cover a distance of 240 km. in 4 hours. What is the difference between speed of the train and car?

A principal increase by 50 percent in five years at the rate of simple interest. What will be the compound interest for 3 years at Rs 20,000 with the same interest rate?

The average salary of 12 employees in a company was recorded to be ₹20,000. If the salary of the manager is also included, then the average salary increases by ₹2,000. Find the salary of the manager.