Worksheets and activities. Suitable for KS4. The topic of Factors from the Year 8 book of the Mathematics Enhancement Program. For information about these resources and an index for the whole collection please visit http://www.mrbartonmaths.com/CIMT.htm Keywords: Factor, Prime Number, Highest Common Factor, Lowest Common Multiple, HCF, LCM, Index Notation, Power, Square, Square Root, Factor Tree.