The compound interest on Rs. 6250 at 12% per annum for 1 year, compounded half-yearly is

By selling 15 mangoes, a fruit seller gains the selling price of 3 mangoes. His gain is

The average age of P, Q, R, and S is 30 years. How old is R?
I. The sum of ages of P and R is 60 years.
II. S is 10 years younger than R.

Value of $$ \sqrt{6+\sqrt {6+\sqrt {6+....}}}$$

Find the value of. 67²–33².

One side of the rectangular ground is 8m and its diagonal is 17m. Find the area of the ground?

A rectangular ground 16m long and 10m breadth. It has a gravel path 2.5m wide all around it on the outside. What is the area of the path?

A solid metallic cylinder of base radius 5 cm and height 7 cm is melted to form cones, each of height 1 cm and base radius 1 mm. Find the number of cones?