500
Kevin has a rabbit, a ferret, a gerbil, and a turtle. He feeds
them in a different order each day. This is how many different orders Kevin can feed his pets.
What is 24?
RFGT, RFTG, RGTF, RGFT, RTGF, RTFG;
FGTR, FGRT, FRTG, FRGT, FTRG, FTGR;
GFTR, GFRT, GRTF, GRFT, GTRF, GTFR;
TFRG, TFGR, TRGF, TRFG, TGFR, TGRF