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

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

Find the odd one out.

If the sum of a number and its reciprocal be 2, then the number is

In what ratio does the point T(x,0) divide the segment joining the points S(-4,-1) and U(1,4)?

The length of the two adjacent sides of a rectangle inscribed in a circle are 5 cm and 12 cm respectively. Then the radius of the circle will be

If sin 30° + cos 45° = X, then the value of X.

If tanα = 2 - 1, then the value of  tanα - cotα = ?