O is the centre of a circle of radius 8 cm. The tangent at a point A on the circle cuts a line through O at B such that AB = 15 cm. Find OB.

Three metallic solid cubes whose edges are 3 cm, 4 cm and 5 cm are melted and formed into a single cube. Find the edge of the cube so formed.

OR

How many shots each having diameter of 3 cm can be made from a cuboidal lead solid of dimensions

The following table shows the ages of the patients admitted in a hospital during a year:

Find the mode and the mean of the data given above. Compare and interpret the two measures of central tendency.

Given that HCF (96,404) is 4, find the LCM (96,404).

The mean of first ‘n’ odd natural numbers is . Then n =