Quantitative Aptitude - Arithmetic Ability Questions

Calculate the difference between the square of the largest and smallest two-digit prime numbers.

A factory buys 8 machines. 3 Machine­A, 4 Machine­B and rest Machine­C. Prices of the machines are Rs 45000, Rs 25000 and Rs 35000 respectively. Calculate the average cost (in Rs) of these machines?

P can do a piece of work in 60 days & Q can do the same work in 50 days. Find the ratio of working efficiencies of P to Q.

ΔPQR is right angled at Q. If cosecP = 25/24, then what is the value of cotR ?

The length and breadth of a rectangle are 15 cm and 8 cm respectively. Find its area (in cm2)

Two circles touch each other at point X. Two common tangents of the circles meet at point P and none of the tangents passes through X. These tangents touch the larger circle at points B and C. If the radius of the larger circle is 15 cm and CP = 20 cm, then what is the radius (in cm) of the smaller circle?

Find the curved surface area (in cm2) of a hemisphere of diameter 7 cm.

Aparna changes the marked price of an item to 50% above its C.P. What % of discount allowed in approximately to gain 10%?