Quantitative Aptitude - Arithmetic Ability Questions

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

Find the area (in cm²) of a semi-circle of radius 21 cm.

Select the odd word/letters/number/number pair from the given alternatives.

What is the perimeter of the sector whose central angle is 60° and radius of the circle is 21 cm?

The distance between the points (11,­5) and (k,0) is 13. Find k.

What is the value of 2sec2A?

Find the value of 64344?

A bank offers 10% compound interest per half year. A customer deposits Rs. 2000 each on 1st January and 1st July of a year. At the end of the year, the amount he would have gained by way of interest is