Quantitative Aptitude - Arithmetic Ability Questions

The sum of a non-zero number and ten times its reciprocal is 7. Find the number.

Select the odd letters from the given alternatives.

If x+1x=5,then the value of x1+x+x2 is

If cosx.cosy + sinx.siny = -1 then cosx + cosy is

What is the value of [(cos 7A + cos 5A)÷(sin 7A – sin 5A)]?

If x = 2 +√3, y = 2 – √3 and z = 1, then what is the value of (x/yz) + (y/xz) + (z/xy) + 2 [(1/x) + (1/y) + (1/z)]?

What is the Compound interest on Rs. 5000 in 3 years, if the rate of interest is 4% for the first year, 3% for the second year and 2% for the third year?

A and B can together do a piece of work in 6 days and A alone can do it in 9 days. The number of days B will take to do it alone is