Quantitative Aptitude - Arithmetic Ability Questions

A car covers the first 30 km at a speed of 60 kmph and the next 20 km at 80 kmph. Find the average speed.

A money lender lends Rs. 400 for 3 years to a person and lends Rs. 500 for 4 years to the other person at the same rate of simple interest. If altogether he receives Rs. 160 as interest, what is the rate of interest per annum ?

The diameters of two cylinders are in the ratio 3:2 and their volumes are equal. The ratio of their heights is

Find the smallest 8 digit number which is exactly divisible by 121.

54% of 4000 is

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

Find the degree of the polynomial 8x4 + 2x2y3 + 4

If a - b = -7 and a2+ b2= 85, then find ab.