PATH=/bin:/usr/bin

for i in /home/ajr/q6/*
do
    if test -f "$i"
    then
        if test `wc -l <"$i"` -eq 3
        then
            rm "$i"
        fi
    fi
done

# Note that we know that "$i" does not begin with a minus sign, because we
# know it begins with "/home/ajr/q6/".