Creating Sets of Parameters
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Some values need to be used together in sets. For example, you may have a question that needs to use one of the sets of Pythagorean triples. This can be done using list references.
If you create the following parameters definitions.
You can choose a set of values which are Pythagorean triples using these parameters.
Side 1 = $a[$ref]
Side 2 = $b[$ref]
Hypotenuse = $c[$ref]
Every time you refresh the parameters, $ref will be updated with a new random value and this will select (by reference) a number from the $a list and the corresponding values from the $b and $c lists.