Quantitative Aptitude - Arithmetic Ability Questions

Find the odd one out.

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.

A telegraph post is bent at a point above the ground. Its top just touches the ground at a distance of 8√3 m from its foot and makes an angle of 30° with the horizontal. The height (in metre) of the post is

The number of sides of a regular polygon whose exterior angles are each 60 deg is

If 70% of 5/7th of a number is 90, find the number.

Find the greatest number which on dividing 391 and 318 leaves remainders 7 and 6 respectively.

A cylindrical vessel of height 7 cm and radius 5 cm is completely filled with sand. When this sand is poured out it forms a right circular cone of radius 8 cm what will be the height of this cone?

Which instrument is used for viewing the sun?