Quantitative Aptitude - Arithmetic Ability Questions

If a - b = 1 and ab = 6, then what is the value of a3- b3?

If the volume of a cylinder is 3850 cubic cm and height is 25 cm, what is its radius? (Take π = 22/7)

In ΔPQR, S and T are points on side PQ and PR respectively. ST is parallel to QR. If lengths of PS, SQ and PR are 6 cm, 9 cm and 12.5 cm respectively, what is the length of TR?

How many numbers divisible by 125 can be written by using all the digits 2,3,8,7,5 exactly once?

The cost of levelling a circular field at 50 Paise per square metre is Rs 7700. The cost (in Rs) of putting up a fence all round it at Rs 1.20 per meter is ( Use π = 22/7)

A line cuts two concentric circles. The lengths of chords formed by that line on the two circles are 4 cm and 16 cm. What is the difference (in cm2) in squares of radii of two circles?

Calculate the area (in cm2) of a circle of radius 17.5 cm.

If a2b+c=b2c+a=c2a+b=1 then the value of 21+a+21+b+21+c