Quantitative Aptitude - Arithmetic Ability Questions

An octahedron has 6 vertices. How many edges does it have?

If 493/29 = 17, then 4.93/0.0017 = ?

In a triangle PQR, ∠Q = 90°. If PQ = 12 cm and QR = 5 cm, then what is the radius (in cm) of the circum circle of the triangle?

The price of an article is cut by 9%, to restore to its original value, the new price must be increased by

Let ΔABC and ΔABD be on the same base AB and between the same parallels AB and CD. Then the relation between areas of triangles ABC and ABD will be

(1132 + 1152 + 1172 - 113 x 115 - 115 x 117 - 117 x 113) is equal to

Ramesh and Rahman can do a work in 20 and 25 days respectively. After doing collectively 10 days of work, they leave the work due to illness and Suresh completes rest of the work in 3 days. How many days Suresh alone can take to complete the whole work ?

What is the average of all the one digit and two digit natural numbers?