Quantitative Aptitude - Arithmetic Ability Questions

A is twice as good as B and together they finish a piece of work in 16 days. The number of days taken by A alone to finish the work is

In the given figure,PQ = PS = SR and QPS = 40 deg, then what is the value of QPR (in deg) ?

If ab+ba=1,then the value of a3+b3 is

If x – 3 + [1/(x – 3)] = 4, what is the value of [(x – 3)3+ [1/(x – 3)3]?

At what rate of compound interest per annum will a sum of Rs 10000 become Rs 12321 in 2 years?

In ΔABC, D and E are points on side AB and AC respectively. DE is parallel to BC. If lengths of AD, DB and DE are 8 cm, 6 cm and 7.2 cm respectively, find length of BC?

If x2-2x+1=0,then the value of x4+1x4 is

What is the value of 1/√2 Cot 30° + 1/√3 Cosec 60°?