Quantitative Aptitude - Arithmetic Ability Questions

The radius of a hemisphere is 21 cm, what is its volume? (Take π = 22/7)

Dodecahedron has 30 edges. How many vertices does it have?

Mohan starts to calculate sum of all odd natural number less than 83. What result does he get?

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?

What are the co­ordinates of the mid point of the segment joining points C(5,­-2) and D(­-1,8).

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

If X = 423 + 32 then find the value of  ( X + 1X ).

A bank offers 15% compound interest per half year. A customer deposits Rs 7200 each on 1st January and 1st July of a year. At the end of the year, the amount he would have gained by means of interest is