Quantitative Aptitude - Arithmetic Ability Questions

The circumference of a circle is 110 cm. Find its radius (in cm).

In a week, how many times are the hands of a clock at right angles with each other?

A trader buys 500 kgs of cotton for Rs 9,000. 10% of this cotton is spoiled due to rain. At what rate (Rs/Kg) should he sell the rest to earn 10% profit?

ΔXYZ is similar to ΔPQR. If ratio of Perimeter of ΔXYZ and Perimeter of ΔPQR is 4:9 and if PQ = 27 cm, then what is the length of XY (in cm)?

The greatest perfect square number of 6 digits is

Find the total surface area (in cm2 ) of a hemisphere of diameter 42 cm.

If 15 persons can do a job in 30 days, then 30 persons with twice the efficiency can do the same job in how many days?

A mixture of 240 litres of juice and water contains 15% water. How much more water (in litres) should be added to this so that the strength of water will become 25% in the new mixture?