Quantitative Aptitude - Arithmetic Ability Questions

A money lender lends Rs. 400 for 3 years to a person and lends Rs. 500 for 4 years to the other person at the same rate of simple interest. If altogether he receives Rs. 160 as interest, what is the rate of interest per annum ?

A can do a work in 16 days and B in 20 days. If they work on it together for 8 days, then what fraction of work is left?

Three solid spheres have their radii r1, r2 and r3. The spheres are melted to form a solid sphere of bigger radius. Then the radius of the new sphere is

Find out the odd word/letters/number/number pair from the given alternatives.

Find out the odd word/letters/number/number pair from the given alternatives.

ΔPQR is right angled at Q. If cosP = 5/13, then what is the value of cosecR ?

If 123 x 356 = 43788, then 1.23 x 0.356 = ?

What is the area (in sq cm) of a rhombus if the lengths of its diagonals are 25 cm and 20 cm?