Material that can't carry electric charges

The blank button automatically displays next to the data when you select a range of numeric data which is an available option for creating a chart

The place where the extended axis of the earth would touch the celestial sphere is called the celestial

An english teacher would like to divide 8 boys and 10 girls into groups, each with the same combination of boys and girls and nobody left out. what is the greatest number of groups that can be formed?