Quantitative Aptitude - Arithmetic Ability Questions

If x + y + z = 0, then what is the value of (3y2 + x2 + z2 )/(2y2 – xz)?

Two equal circles intersect so that their centres, and the points at which they intersect form a square of side 1 cm. The area (in sq.cm) of the portion that is common to the circles is

In ΔPQR, S and T are points on side PQ and PR respectively. ST is parallel to QR. If lengths of PS, SQ and PR are 6 cm, 9 cm and 12.5 cm respectively, what is the length of TR?

If two marbles are picked at random, what is the probability that either both are red or both are green?

A sum of Rs. 3000 amounts to Rs. 6000 in two years at compound interest. The interest for four years is

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

A water tank is 2/5 th full. Inlet A can fill the tank in 12 minutes while an outlet pipe B can empty it in 6minutes. If both the pipes are open, how long will it take to empty or fill the tank completely?

Select the odd letters from the given alternatives.