Quantitative Aptitude - Arithmetic Ability Questions

3cosA is equal to

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

The base of a triangle is half the base of a parallelogram having the same area as that of the triangle. The ratio of the corresponding heights of the triangle to the parallelogram will be

Two numbers are in the ratio 4:5 and their HCF is 13. Their LCM is

If (-1/2) * ( x - 5) + 3 = -5/2, then what is the value of x?

P and Q together can make a door in 12 days. They started the work together but after 8 days P left the work. The remaining work is completed by Q alone in 7 more days. In how many days can P alone complete the entire work?

A sum becomes Rs 1392 in 2 years and Rs 1488 in 3 years at simple interest. What is the rate (in percentage) of interest per annum?

A sum of Rs 800 becomes Rs 1000 in 2 years at simple interest. What is the per annum rate of interest (in percent)?