Three cones have the same volume as one cylinder of the same diameter and height. Remember the volume of a cylinder is \(\pi r^2 h\). The volume of the cone is one third of the volume of the cylinder.

The interquartile range is another measure of spread, except that it has the added advantage of not being affected by large outlying values. In order to calculate this value we must first understand ...

Secondary schools mark a major step in your child’s education, laying the foundations for GCSEs and future opportunities. With Ofsted no longer providing one-word judgments, The Telegraph’s new ...