Quantitative Aptitude - Arithmetic Ability Questions

Identified the odd one from the list below.

Out of three pipes the first two can fill an empty tank in 9 and 18 hours, respectively while the third can drain the filled tank in 15 hours. If all the three pipes are opened when the tank is empty, after how many hours will the tank be full?

Assuming that the numbers in each of the following figures follow a similar pattern, select the option that can replace the question mark in figure B.

A tent is to be built in the form of a cylinder of radius 7 m surmounted by a cone of the same radius. If the height of the cylindrical part is 8 m and slant height of the conical part is 12 m, how much canvas will be required to build the tent? Allow 20% extra canvas for folding and stitching. (Take π = 22/7)

If tangents PA and PB from a point P to a circle with centre O are inclined to each other at an angle of 110 deg then the angle POA is

From the top of a platform, the angle of elevation of a tower was 30 deg. The tower was 45 mts high and the horizontal distance between the platform and the tower was 40√3 m. What was the height of the platform?

The perimeter of two similar triangles is 36 units and 48 units. Find the ratio of their corresponding areas.

What can be the maximum number of common tangent which can be drawn to two non-intersecting circles?