Quantitative Aptitude - Arithmetic Ability Questions

What is the average of 36, 43, 51, 68, and 77?

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

ABCD is a parallelogram in which AB = 7 cm, BC = 9 cm and AC = 8 cm. What is the length (in cm) of other diagonal?

Mahmood can do a piece of work in 40 hours. If he is joined by Janaki who is 50% more efficient, in what time will they together finish the work?

If tan π/3c + cosec π/6c = x, then x is

What is the value of (cos 45 - 1/3) ?

In ΔABC measure of angle B is 90 deg. If cosA = 5/13, and AB = 10 cm, then what is the length (in cm) of side BC?

On a certain principal, simple interest amounts to Rs. 2,000 in two years at the rate of 10% p.a. What will be the difference in the amount of interest if the same is compounded on annual basis?