Quantitative Aptitude - Arithmetic Ability Questions

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 someLogic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

If the equations 6x - 5y + 11 = 0 and 15x + ky - 9 = 0 have no solution, then the value of k is:

The area of a circle is 38.5 cm2. Find its circumference (in cm).

Pipes A, B and C are attached to an empty cistern. While the first two can fill the cistern in 4 and 10 hrs, respectively, the third can drain the cistern, when filled, in 6 hrs. If all the three pipes are opened simultaneously when the cistern is half-full, how many hours will be needed to fill the cistern?

What is the circumference (in cm) of a circle whose area is 616 sq cm?

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

The pair of linear equations 3x + y = 1 and px + 2y = 5 has no finite solution if

Which of the following points lies on the line 3x -­ 4y = ­-13?