Quantitative Aptitude - Arithmetic Ability Questions

What is the value of 10.2+10.02+10.002+... upto 9 terms

A person invested a total sum of Rs 7900 in three different schemes of simple interest at 3%, 5% and 8% per annum. At the end of one year he got same interest in all three schemes. What is the money (in Rs) invested at 3%?

The average of a,b,c is 20 and that of b,c,d is 25; if d=30, then the value of a is

Ehsaan is twice as good a worker as Kamal and together they finish a piece of work in 29 days. In how many days will Kamal, working alone, finish the work?

Sum of lengths of all edges of a cube is 84 cm, find its volume?

In the given figure, PQR is a triangle and quadrilateral ABCD is inscribed in it. QD = 2 cm, QC = 5 cm, CR = 3 cm, BR = 4 cm, PB = 6 cm, PA = 5 cm and AD = 3 cm. What is the area in sq.cm of the quadrilateral ABCD?

If Sin x = 4/5, then Cosec x + Cot x =

The length of a median of an equilateral triangle is 12√3 cms. Then the area of the triangle is