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 √5 = 2.236, then √5/2 is

Find the HCF of 48, 92 and 140

What is the slope of the line parallel to the line passing through the points (6,­3) and (2,­1)?

A boat goes 15 km upstream and 10 1/2 km down stream in 3 hrs 15 min. It goes 12 km upstream and 14 km downstream in 3 hrs. What is the speed of the boat in still water?

Find the value of p, if 2x -­ 4, 4x + p and 6x -­ 12 are in arithmetic progression.

The co-ordinates of the centroid of a triangle ABC are (-1,-2) what are the co-ordinates of vertex C, if co-ordinates of A and B are (6,-4) and (-2,2) respectively?

What is the value of 2 consecutive natural numbers, sum of whose squares is 145?