Quantitative Aptitude - Arithmetic Ability Questions

Keerthana takes 9 hrs 20 min in walking a distance and riding back to same place where she started. She could walk both ways in 11 hrs 15 min. The time taken by her to ride back both ways is

The average of 15 numbers is 7. If the average of the first 8 numbers is 6.5 and the average of the last 8 numbers is 8.5 then middle number is

Find the odd words/letters/number from the given alternatives.

What is the measure (in degree) of an exterior angle of a regular polygon of 9 sides?

If a - b = 1 and ab = 6, then what is the value of a3- b3?

PQR is an equilateral triangle whose side is 10 cm. What is the value (in cm) of the inradius of triangle PQR?

If Cot θ = 24/7, then what is the value of Sec θ?

A pentagonal prism has 15 edges. How many vertices does it have?