Quantitative Aptitude - Arithmetic Ability Questions

Calculate the area (in cm2) of a circle of radius 17.5 cm.

The ratio of spirit and water in the two vessels is 5 : 1 and 3 : 7 respectively. In what ratio the liquid of both the vessels should be mixed such that a new mixture containing half spirit and half water is obtained?

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

A can do a work in 36 days and B in 12 days. If they work on it together, then in how many days will they be able to do the work?

If 2x2+2y2=4a the find the value of 2ax2-a+2ay2-a

In the following question, four number pairs are given. The number on left side of (–) is related to the number on the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given options.

If x=aCosθCosΦ, y = aCosθSinΦ and z= aSinθ, then the value of x2+ y2 + z2 is