Quantitative Aptitude - Arithmetic Ability Questions

What is the curved surface area (in cm²) of a hemisphere of diameter 42 cm?

ΔPQR is right angled at Q. If cosP = 3/5, then what is the value of cosR ?

Two smaller circles touch a large circle internally and pass through the center O of the larger circle. If the diameter of the bigger circle is 28 cm, thenwhat is the area of the bigger circle which is not enclosed by the two smaller circles (in sq.cm)?

Two circles of radii 17 cm and 8 cm are concentric. The length of a chord of greater circle which touches the smaller circle is

What is the value of 26 + 152?

If the difference between the roots of the equation Ax2 – Bx + C = 0 is 4, then which of the following is TRUE?

In the following question, select the odd letter/letters from the given alternatives.

By what least number should 1200 be multiplied so that it becomes a perfect square?