I thought I would share this neat little table of squares and cubes of numbers. The squares are straight forward but the cubes use Major System Mnemonics to arrive at their given numbers:
Obviously the pegs or keywords for each number cue to each of the phrases:
So, #5 = Lie which cues you to the keyword DENIAL = 125 (thus 5 cubed = 125). All keywords and cues given in the table are self-explanatory and can literally learnt in a couple of minutes.