Although the Mathematical Reasoning module of the GED allows you to utilize a calculator for most of its questions, knowledge of mathematical tables is useful for the five
Knowing multiplication and division tables is particularly helpful with factoring and simplifying a square root.
Knowing mathematical tables has a way of coming in handy in real life, too.
The following downloadable tables are not provided by the GED:
Square Root = √ Number² = √ Number × Itself
Factor × Factor = Multiple
Number Squared = Number × Itself = Number²