Quantitative Aptitude - Arithmetic Ability Questions

The radius of a sphere and hemisphere are same. The ratio of their total surface area is

The rate of simple interest per annum at which a sum of money double itself in 16 2/3 yrs is

In 2 years at simple interest the principal increases by 8%. What will be the compound interest earned (in Rs) on Rs 10 lakhs in 2 years at the same rate?

The ratio of two numbers is 3 : 7. If their product is 1344, then what is the sum of both the numbers?

A certain bank offers 8% rate of interest on the 1st year and 9% on the 2nd year in a certain fixed deposit scheme. If Rs 17,658 are received after investing for 2 years in this scheme, then what was the amount (in Rs) invested?

A can do a piece of work in 20 days and B in 15 days. With help of C, they finish the work in 5 days. C can alone do the work in

If 1/√(1+tan2A) = x, then value of x is

25% discount is offered on an item. By applying a promo code a customer wins 10% cash back. What is the effective discount?