I assume that preptest 48 p. 148; preptest 42 p. 153; and preptest 43 p. 154 are all of the "variable grouping" games that have appeared on preptests 32-53.
I'd like to know if "variable grouping" games appear in preptests 1-31 or else 54-66. If so, a citation would be enormously appreciated.
Cheers,
Liz