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

Which of the numbers given below is NOT rational?

What is the area of the square, if the length of its diagonal is 13√2 units?

The number of sides of a regular polygon whose exterior angles are each 40 deg is

The two lines 4x+3y=0 and 7x+5y=0 will ______ in their graphical representation.

The S.P of a washing machine is 1 1/3 of its C.P. Find the gain percent.

The average age of 36 students in a group is 14 years. When the teacher's age is included in it, the average increases by one. The teacher's age in years is

In ΔPQR, PQ = PR = 18 cm, AB and AC are parallel to lines PR and PQ respectively. If A is the mid-point of QR, then what is the perimeter (in cm) of quadrilateral ABPC?