Quantitative Aptitude - Arithmetic Ability Questions

In the following question, four groups of three numbers are given. In each group the second and third number are related to the first number by aLogic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

If an interior of a regular polygon is 170o, then the number of sides of the polygon is

Two adjacent sides of a parallelogram are 21 cms and 20 cms. The diagonal joining the end points of these two sides is 29 cms. The area of the parallelogram (in sq.cms) is

What is the curved surface area (in cm²) of a hemisphere of diameter 42 cm?

Three sides of a triangle are 5 cm, 9 cm and x cm. The minimum integral value of x is

The cash difference between the selling price of an article at a profit of 2% and 16% is Rs.3. The ratio of two selling prices is

Which is the correct ascending order of the given numbers?

Two pipes P and Q can fill an empty tank in 25 hours and 20 hours respectively. Pipe R alone can empty the completely filled tank in 50 hours. Firstly both the pipes P and Q are opened and after 8 hours pipe R is also opened. What will be the total time (in hours) taken to completely fill the tank?